diff --git a/06-containers-on-the-cloud.html b/06-containers-on-the-cloud.html
index 497cb2ed..c32513b9 100644
--- a/06-containers-on-the-cloud.html
+++ b/06-containers-on-the-cloud.html
@@ -537,9 +537,9 @@ <h3 id="edit-your-repositorys-bitbucket-pipelines-yml-file-through-the-web">Edit
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/06-containers-on-the-cloud.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/06-containers-on-the-cloud.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/08-orchestration.html b/08-orchestration.html
index 88b7185a..184b4b14 100644
--- a/08-orchestration.html
+++ b/08-orchestration.html
@@ -468,9 +468,9 @@ <h3 class="callout-title">The Wild West</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/08-orchestration.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/08-orchestration.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/404.html b/404.html
index d5304bbb..e92862a9 100644
--- a/404.html
+++ b/404.html
@@ -406,9 +406,9 @@ <h1>Page not found</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/404.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/404.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 0361e56a..4fa6eb93 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
@@ -420,9 +420,9 @@ <h1>Contributor Code of Conduct</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/CODE_OF_CONDUCT.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/CODE_OF_CONDUCT.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/LICENSE.html b/LICENSE.html
index 5114e5ca..e6fe6482 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -468,9 +468,9 @@ <h1>Licenses</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/LICENSE.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/LICENSE.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/about.html b/about.html
index e69ad6dc..571f0b87 100644
--- a/about.html
+++ b/about.html
@@ -413,9 +413,9 @@ <h1>About</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/about.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/about.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/advanced-containers.html b/advanced-containers.html
index a93e782f..2b212e13 100644
--- a/advanced-containers.html
+++ b/advanced-containers.html
@@ -437,7 +437,7 @@ <h3 class="callout-title">Running containers</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>We can run a container from the alpine-python container image
 using:</p>
@@ -600,7 +600,7 @@ <h3 class="callout-title">Exercise: Explore the script</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>This script comes from <a href="https://wiki.python.org/moin/SimplePrograms" class="external-link">the Python Wiki</a>
 and is set to add all numbers that are passed to it as arguments.</p>
@@ -626,7 +626,7 @@ <h3 class="callout-title">Exercise: Checking the options</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>Here’s a breakdown of each piece of the command above</p>
 <ul><li>
@@ -667,7 +667,7 @@ <h3 class="callout-title">Exercise: Interactive jobs</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>The docker command to run the container interactively is:</p>
 <div class="codewrapper sourceCode" id="cb10">
@@ -766,7 +766,7 @@ <h3 class="callout-title">Exercise: Did it work?</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>You can start the container interactively like so:</p>
 <div class="codewrapper sourceCode" id="cb16">
@@ -1041,9 +1041,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/advanced-containers.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/advanced-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index e3212c42..d309a882 100644
--- a/aio.html
+++ b/aio.html
@@ -406,7 +406,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
         
 <section id="aio-introduction"><p>Content from <a href="introduction.html">Introducing Containers</a></p>
 <hr>
-<p>Last updated on 2024-08-01 |
+<p>Last updated on 2024-09-16 |
 
         <a href="https://github.com/carpentries-incubator/docker-introduction/edit/main/episodes/introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
@@ -539,55 +539,33 @@ <h3 class="callout-title">Software and Science</h3>
 containers to the rescue! Containers provide a way to package up
 software dependencies and access to resources such as files and
 communications networks in a uniform manner.</p>
-</section><section><h2 class="section-heading" id="what-is-a-container-what-is-docker">What is a Container? What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-a-container-what-is-docker"></a>
+</section><section><h2 class="section-heading" id="what-is-a-container">What is a Container?<a class="anchor" aria-label="anchor" href="#what-is-a-container"></a>
 </h2>
 <hr class="half-width">
-<p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
-you to build what are called <strong>containers</strong>. It’s not the
-only tool that can create containers, but is the one we’ve chosen for
-this workshop. But what <em>is</em> a container?</p>
-<p>To understand containers, let’s first talk briefly about your
-computer.</p>
-<p>Your computer has some standard pieces that allow it to work – often
-what’s called the hardware. One of these pieces is the CPU or processor;
-another is the amount of memory or RAM that your computer can use to
-store information temporarily while running programs; another is the
-hard drive, which can store information over the long-term. All these
-pieces work together to do the computing of a computer, but we don’t see
-them because they’re hidden from view (usually).</p>
-<p>Instead, what we see is our desktop, program windows, different
-folders, and files. These all live in what’s called the filesystem.
-Everything on your computer – programs, pictures, documents, the
-operating system itself – lives somewhere in the filesystem.</p>
-<p>NOW, imagine you want to install some new software but don’t want to
+<p>Imagine you want to install some research software but don’t want to
 take the chance of making a mess of your existing system by installing a
 bunch of additional stuff (libraries/dependencies/etc.). You don’t want
 to buy a whole new computer because it’s too expensive. What if,
 instead, you could have another independent filesystem and running
 operating system that you could access from your main computer, and that
 is actually stored within this existing computer?</p>
-<p>Or, imagine you have two tools you want to use in your groundbreaking
-research on cat memes: <code>PurrLOLing</code>, a tool that does
-AMAZINGLY well at predicting the best text for a meme based on the cat
-species and <code>WhiskerSpot</code>, the only tool available for
-identifying cat species from images. You want to send cat pictures to
-<code>WhiskerSpot</code>, and then send the species output to
-<code>PurrLOLing</code>. But there’s a problem: <code>PurrLOLing</code>
-only works on Ubuntu and <code>WhiskerSpot</code> is only supported for
-OpenSUSE so you can’t have them on the same system! Again, we really
-want another filesystem (or two) on our computer that we could use to
-chain together <code>WhiskerSpot</code> and <code>PurrLOLing</code> in a
-<strong>computational pipeline</strong>…</p>
-<p>Container systems, like Docker, are special programs on your computer
-that make it possible! The term container can be usefully considered
-with reference to shipping containers. Before shipping containers were
-developed, packing and unpacking cargo ships was time consuming and
-error prone, with high potential for different clients’ goods to become
-mixed up. Just like shipping containers keep things together that should
-stay together, software containers standardize the description and
-creation of a complete software system: you can drop a container into
-any computer with the container software installed (the ‘container
-host’), and it should <em>just work</em>.</p>
+<p>More concretely, Docker Inc use the following definition of a
+container:</p>
+<blockquote>
+<p>A container is a standard unit of software that packages up code and
+all its dependencies so the application runs reliably from one computing
+environment to another.</p>
+</blockquote>
+<p><a href="https://www.docker.com/resources/what-container/" class="external-link uri">https://www.docker.com/resources/what-container/</a></p>
+<p>The term container can be usefully considered with reference to
+shipping containers. Before shipping containers were developed, packing
+and unpacking cargo ships was time consuming and error prone, with high
+potential for different clients’ goods to become mixed up. Just like
+shipping containers keep things together that should stay together,
+software containers standardize the description and creation of a
+complete software system: you can drop a container into any computer
+with the container software installed (the ‘container host’), and it
+should <em>just work</em>.</p>
 <div id="virtualization" class="callout">
 <div class="callout-square">
 <i class="callout-icon" data-feather="bell"></i>
@@ -608,6 +586,15 @@ <h3 class="callout-title">Virtualization</h3>
 </div>
 </div>
 </div>
+</section><section><h2 class="section-heading" id="what-is-docker">What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-docker"></a>
+</h2>
+<hr class="half-width">
+<p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
+you to build and run containers. It’s not the only tool that can create
+containers, but is the one we’ve chosen for this workshop.</p>
+</section><section><h2 class="section-heading" id="container-images">Container Images<a class="anchor" aria-label="anchor" href="#container-images"></a>
+</h2>
+<hr class="half-width">
 <p>One final term: while the <strong>container</strong> is an
 alternative filesystem layer that you can access and run from your
 computer, the <strong>container image</strong> is the ‘recipe’ or
@@ -1243,7 +1230,7 @@ <h3 class="callout-title">Exercise: Check on Your Images</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>To see if the <code>hello-world</code> container image is now on your
 computer, run:</p>
@@ -1401,7 +1388,7 @@ <h3 class="callout-title">Hello World, Part 2</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use the same command as above, but with the <code>echo</code> command
 to print a message.</p>
@@ -1494,7 +1481,7 @@ <h3 class="callout-title">Practice Makes Perfect</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Solution 1 – Interactive </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Run an interactive ubuntu container – you can use
 <code>docker image pull</code> first, or just run it with this
@@ -1532,7 +1519,7 @@ <h3 class="code-label">BASH<i aria-hidden="true" data-feather="chevron-left"></i
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Solution 2 – Run commands </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>Run a ubuntu container, first with a command to read out the Linux
 version:</p>
@@ -2667,7 +2654,7 @@ <h3 class="callout-title">Running containers</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>We can run a container from the alpine-python container image
 using:</p>
@@ -2830,7 +2817,7 @@ <h3 class="callout-title">Exercise: Explore the script</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>This script comes from <a href="https://wiki.python.org/moin/SimplePrograms" class="external-link">the Python Wiki</a>
 and is set to add all numbers that are passed to it as arguments.</p>
@@ -2856,7 +2843,7 @@ <h3 class="callout-title">Exercise: Checking the options</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>Here’s a breakdown of each piece of the command above</p>
 <ul>
@@ -2899,7 +2886,7 @@ <h3 class="callout-title">Exercise: Interactive jobs</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>The docker command to run the container interactively is:</p>
 <div class="codewrapper sourceCode" id="cb10">
@@ -3000,7 +2987,7 @@ <h3 class="callout-title">Exercise: Did it work?</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>You can start the container interactively like so:</p>
 <div class="codewrapper sourceCode" id="cb16">
@@ -3549,7 +3536,7 @@ <h3 class="callout-title">Positives and negatives</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This is not an exhaustive list but some of the advantages and
 disadvantages could be:</p>
@@ -3697,9 +3684,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/aio.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/aio.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/creating-container-images.html b/creating-container-images.html
index 52a010b1..b3e8d4c4 100644
--- a/creating-container-images.html
+++ b/creating-container-images.html
@@ -867,9 +867,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/creating-container-images.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/creating-container-images.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/discuss.html b/discuss.html
index d59e8eb0..7be77536 100644
--- a/discuss.html
+++ b/discuss.html
@@ -413,9 +413,9 @@ <h1>Discussion</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/discuss.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/discuss.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/docker-hub.html b/docker-hub.html
index a3f8c3b8..ca8d7036 100644
--- a/docker-hub.html
+++ b/docker-hub.html
@@ -652,9 +652,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/docker-hub.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/docker-hub.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/docker-image-examples.html b/docker-image-examples.html
index b10209fa..f05f6f2e 100644
--- a/docker-image-examples.html
+++ b/docker-image-examples.html
@@ -503,9 +503,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/docker-image-examples.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/docker-image-examples.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/e01-github-actions.html b/e01-github-actions.html
index b2e76953..480405cf 100644
--- a/e01-github-actions.html
+++ b/e01-github-actions.html
@@ -644,9 +644,9 @@ <h1 id="reference-material">Reference material<a class="anchor" aria-label="anch
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/e01-github-actions.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/e01-github-actions.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/images.html b/images.html
index 8e4aed97..ef9354d5 100644
--- a/images.html
+++ b/images.html
@@ -463,9 +463,9 @@ <h3 id="introduction-figure-1">Figure 1</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/images.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/images.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/index.html b/index.html
index e13c8558..cc3a188e 100644
--- a/index.html
+++ b/index.html
@@ -708,9 +708,9 @@ <h3 id="a-quick-tutorial-on-copypasting-file-contents-from-episodes-of-the-lesso
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/index.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/index.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor-notes.html b/instructor-notes.html
index 2183c9a2..5f2e987c 100644
--- a/instructor-notes.html
+++ b/instructor-notes.html
@@ -722,9 +722,9 @@ <h3 id="learner-pathways">Learner Pathways<a class="anchor" aria-label="anchor"
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor-notes.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor-notes.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/06-containers-on-the-cloud.html b/instructor/06-containers-on-the-cloud.html
index 0e91b72e..775a4292 100644
--- a/instructor/06-containers-on-the-cloud.html
+++ b/instructor/06-containers-on-the-cloud.html
@@ -539,9 +539,9 @@ <h3 id="edit-your-repositorys-bitbucket-pipelines-yml-file-through-the-web">Edit
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/06-containers-on-the-cloud.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/06-containers-on-the-cloud.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/08-orchestration.html b/instructor/08-orchestration.html
index 4557ea84..54d40d7f 100644
--- a/instructor/08-orchestration.html
+++ b/instructor/08-orchestration.html
@@ -470,9 +470,9 @@ <h3 class="callout-title">The Wild West</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/08-orchestration.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/08-orchestration.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/404.html b/instructor/404.html
index e56b9036..75165e2f 100644
--- a/instructor/404.html
+++ b/instructor/404.html
@@ -406,9 +406,9 @@ <h1>Page not found</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/404.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/404.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/CODE_OF_CONDUCT.html b/instructor/CODE_OF_CONDUCT.html
index e2a04a8c..234fc77a 100644
--- a/instructor/CODE_OF_CONDUCT.html
+++ b/instructor/CODE_OF_CONDUCT.html
@@ -422,9 +422,9 @@ <h1>Contributor Code of Conduct</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/CODE_OF_CONDUCT.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/CODE_OF_CONDUCT.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/LICENSE.html b/instructor/LICENSE.html
index 7c685350..ee05d86b 100644
--- a/instructor/LICENSE.html
+++ b/instructor/LICENSE.html
@@ -470,9 +470,9 @@ <h1>Licenses</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/LICENSE.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/LICENSE.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/about.html b/instructor/about.html
index a04ec50b..1fcadf45 100644
--- a/instructor/about.html
+++ b/instructor/about.html
@@ -415,9 +415,9 @@ <h1>About</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/about.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/about.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/advanced-containers.html b/instructor/advanced-containers.html
index 31d4e8c4..d763b5fe 100644
--- a/instructor/advanced-containers.html
+++ b/instructor/advanced-containers.html
@@ -439,7 +439,7 @@ <h3 class="callout-title">Running containers</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>We can run a container from the alpine-python container image
 using:</p>
@@ -602,7 +602,7 @@ <h3 class="callout-title">Exercise: Explore the script</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>This script comes from <a href="https://wiki.python.org/moin/SimplePrograms" class="external-link">the Python Wiki</a>
 and is set to add all numbers that are passed to it as arguments.</p>
@@ -628,7 +628,7 @@ <h3 class="callout-title">Exercise: Checking the options</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>Here’s a breakdown of each piece of the command above</p>
 <ul><li>
@@ -669,7 +669,7 @@ <h3 class="callout-title">Exercise: Interactive jobs</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>The docker command to run the container interactively is:</p>
 <div class="codewrapper sourceCode" id="cb10">
@@ -768,7 +768,7 @@ <h3 class="callout-title">Exercise: Did it work?</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>You can start the container interactively like so:</p>
 <div class="codewrapper sourceCode" id="cb16">
@@ -1043,9 +1043,9 @@ <h3 class="callout-title">Key Points</h3>
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/advanced-containers.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/advanced-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/aio.html b/instructor/aio.html
index 98f00161..f8df0e81 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -416,7 +416,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
         
 <section id="aio-introduction"><p>Content from <a href="introduction.html">Introducing Containers</a></p>
 <hr>
-<p>Last updated on 2024-08-01 |
+<p>Last updated on 2024-09-16 |
 
         <a href="https://github.com/carpentries-incubator/docker-introduction/edit/main/episodes/introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 25 minutes</p>
@@ -550,55 +550,33 @@ <h3 class="callout-title">Software and Science</h3>
 containers to the rescue! Containers provide a way to package up
 software dependencies and access to resources such as files and
 communications networks in a uniform manner.</p>
-</section><section><h2 class="section-heading" id="what-is-a-container-what-is-docker">What is a Container? What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-a-container-what-is-docker"></a>
+</section><section><h2 class="section-heading" id="what-is-a-container">What is a Container?<a class="anchor" aria-label="anchor" href="#what-is-a-container"></a>
 </h2>
 <hr class="half-width">
-<p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
-you to build what are called <strong>containers</strong>. It’s not the
-only tool that can create containers, but is the one we’ve chosen for
-this workshop. But what <em>is</em> a container?</p>
-<p>To understand containers, let’s first talk briefly about your
-computer.</p>
-<p>Your computer has some standard pieces that allow it to work – often
-what’s called the hardware. One of these pieces is the CPU or processor;
-another is the amount of memory or RAM that your computer can use to
-store information temporarily while running programs; another is the
-hard drive, which can store information over the long-term. All these
-pieces work together to do the computing of a computer, but we don’t see
-them because they’re hidden from view (usually).</p>
-<p>Instead, what we see is our desktop, program windows, different
-folders, and files. These all live in what’s called the filesystem.
-Everything on your computer – programs, pictures, documents, the
-operating system itself – lives somewhere in the filesystem.</p>
-<p>NOW, imagine you want to install some new software but don’t want to
+<p>Imagine you want to install some research software but don’t want to
 take the chance of making a mess of your existing system by installing a
 bunch of additional stuff (libraries/dependencies/etc.). You don’t want
 to buy a whole new computer because it’s too expensive. What if,
 instead, you could have another independent filesystem and running
 operating system that you could access from your main computer, and that
 is actually stored within this existing computer?</p>
-<p>Or, imagine you have two tools you want to use in your groundbreaking
-research on cat memes: <code>PurrLOLing</code>, a tool that does
-AMAZINGLY well at predicting the best text for a meme based on the cat
-species and <code>WhiskerSpot</code>, the only tool available for
-identifying cat species from images. You want to send cat pictures to
-<code>WhiskerSpot</code>, and then send the species output to
-<code>PurrLOLing</code>. But there’s a problem: <code>PurrLOLing</code>
-only works on Ubuntu and <code>WhiskerSpot</code> is only supported for
-OpenSUSE so you can’t have them on the same system! Again, we really
-want another filesystem (or two) on our computer that we could use to
-chain together <code>WhiskerSpot</code> and <code>PurrLOLing</code> in a
-<strong>computational pipeline</strong>…</p>
-<p>Container systems, like Docker, are special programs on your computer
-that make it possible! The term container can be usefully considered
-with reference to shipping containers. Before shipping containers were
-developed, packing and unpacking cargo ships was time consuming and
-error prone, with high potential for different clients’ goods to become
-mixed up. Just like shipping containers keep things together that should
-stay together, software containers standardize the description and
-creation of a complete software system: you can drop a container into
-any computer with the container software installed (the ‘container
-host’), and it should <em>just work</em>.</p>
+<p>More concretely, Docker Inc use the following definition of a
+container:</p>
+<blockquote>
+<p>A container is a standard unit of software that packages up code and
+all its dependencies so the application runs reliably from one computing
+environment to another.</p>
+</blockquote>
+<p><a href="https://www.docker.com/resources/what-container/" class="external-link uri">https://www.docker.com/resources/what-container/</a></p>
+<p>The term container can be usefully considered with reference to
+shipping containers. Before shipping containers were developed, packing
+and unpacking cargo ships was time consuming and error prone, with high
+potential for different clients’ goods to become mixed up. Just like
+shipping containers keep things together that should stay together,
+software containers standardize the description and creation of a
+complete software system: you can drop a container into any computer
+with the container software installed (the ‘container host’), and it
+should <em>just work</em>.</p>
 <div id="virtualization" class="callout">
 <div class="callout-square">
 <i class="callout-icon" data-feather="bell"></i>
@@ -619,6 +597,15 @@ <h3 class="callout-title">Virtualization</h3>
 </div>
 </div>
 </div>
+</section><section><h2 class="section-heading" id="what-is-docker">What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-docker"></a>
+</h2>
+<hr class="half-width">
+<p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
+you to build and run containers. It’s not the only tool that can create
+containers, but is the one we’ve chosen for this workshop.</p>
+</section><section><h2 class="section-heading" id="container-images">Container Images<a class="anchor" aria-label="anchor" href="#container-images"></a>
+</h2>
+<hr class="half-width">
 <p>One final term: while the <strong>container</strong> is an
 alternative filesystem layer that you can access and run from your
 computer, the <strong>container image</strong> is the ‘recipe’ or
@@ -1256,7 +1243,7 @@ <h3 class="callout-title">Exercise: Check on Your Images</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>To see if the <code>hello-world</code> container image is now on your
 computer, run:</p>
@@ -1414,7 +1401,7 @@ <h3 class="callout-title">Hello World, Part 2</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use the same command as above, but with the <code>echo</code> command
 to print a message.</p>
@@ -1507,7 +1494,7 @@ <h3 class="callout-title">Practice Makes Perfect</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Solution 1 – Interactive </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Run an interactive ubuntu container – you can use
 <code>docker image pull</code> first, or just run it with this
@@ -1545,7 +1532,7 @@ <h3 class="code-label">BASH<i aria-hidden="true" data-feather="chevron-left"></i
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Solution 2 – Run commands </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>Run a ubuntu container, first with a command to read out the Linux
 version:</p>
@@ -2684,7 +2671,7 @@ <h3 class="callout-title">Running containers</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>We can run a container from the alpine-python container image
 using:</p>
@@ -2847,7 +2834,7 @@ <h3 class="callout-title">Exercise: Explore the script</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>This script comes from <a href="https://wiki.python.org/moin/SimplePrograms" class="external-link">the Python Wiki</a>
 and is set to add all numbers that are passed to it as arguments.</p>
@@ -2873,7 +2860,7 @@ <h3 class="callout-title">Exercise: Checking the options</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>Here’s a breakdown of each piece of the command above</p>
 <ul>
@@ -2916,7 +2903,7 @@ <h3 class="callout-title">Exercise: Interactive jobs</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>The docker command to run the container interactively is:</p>
 <div class="codewrapper sourceCode" id="cb10">
@@ -3017,7 +3004,7 @@ <h3 class="callout-title">Exercise: Did it work?</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>You can start the container interactively like so:</p>
 <div class="codewrapper sourceCode" id="cb16">
@@ -3568,7 +3555,7 @@ <h3 class="callout-title">Positives and negatives</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This is not an exhaustive list but some of the advantages and
 disadvantages could be:</p>
@@ -3716,9 +3703,9 @@ <h3 class="callout-title">Key Points</h3>
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/aio.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/aio.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/creating-container-images.html b/instructor/creating-container-images.html
index 1d7dd3fb..9e35258c 100644
--- a/instructor/creating-container-images.html
+++ b/instructor/creating-container-images.html
@@ -869,9 +869,9 @@ <h3 class="callout-title">Key Points</h3>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/creating-container-images.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/discuss.html b/instructor/discuss.html
index b6c567f3..b6e4050f 100644
--- a/instructor/discuss.html
+++ b/instructor/discuss.html
@@ -415,9 +415,9 @@ <h1>Discussion</h1>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/discuss.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/docker-hub.html b/instructor/docker-hub.html
index 1ad5bba5..7e16626c 100644
--- a/instructor/docker-hub.html
+++ b/instructor/docker-hub.html
@@ -654,9 +654,9 @@ <h3 class="callout-title">Key Points</h3>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/docker-hub.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/docker-image-examples.html b/instructor/docker-image-examples.html
index 8cb73411..7214815a 100644
--- a/instructor/docker-image-examples.html
+++ b/instructor/docker-image-examples.html
@@ -505,9 +505,9 @@ <h3 class="callout-title">Key Points</h3>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/docker-image-examples.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/e01-github-actions.html b/instructor/e01-github-actions.html
index c2fa46b4..4c06400f 100644
--- a/instructor/e01-github-actions.html
+++ b/instructor/e01-github-actions.html
@@ -646,9 +646,9 @@ <h1 id="reference-material">Reference material<a class="anchor" aria-label="anch
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/e01-github-actions.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/images.html b/instructor/images.html
index aa87fb2f..c8781ff7 100644
--- a/instructor/images.html
+++ b/instructor/images.html
@@ -473,9 +473,9 @@ <h3 id="introduction-figure-1">Figure 1</h3>
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-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/index.html b/instructor/index.html
index 547b1b18..47d5e103 100644
--- a/instructor/index.html
+++ b/instructor/index.html
@@ -814,9 +814,9 @@ <h3 id="a-quick-tutorial-on-copypasting-file-contents-from-episodes-of-the-lesso
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-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/instructor-notes.html b/instructor/instructor-notes.html
index 9d0e5948..4db890ae 100644
--- a/instructor/instructor-notes.html
+++ b/instructor/instructor-notes.html
@@ -741,9 +741,9 @@ <h3 id="learner-pathways">Learner Pathways<a class="anchor" aria-label="anchor"
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/instructor-notes.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/instructor-notes.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/introduction.html b/instructor/introduction.html
index ce58bf0d..c9ea140a 100644
--- a/instructor/introduction.html
+++ b/instructor/introduction.html
@@ -217,7 +217,9 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#scientific-software-challenges">Scientific Software Challenges</a></li>
-<li><a href="#what-is-a-container-what-is-docker">What is a Container? What is Docker?</a></li>
+<li><a href="#what-is-a-container">What is a Container?</a></li>
+<li><a href="#what-is-docker">What is Docker?</a></li>
+<li><a href="#container-images">Container Images</a></li>
 <li><a href="#putting-the-pieces-together">Putting the Pieces Together</a></li>
 <li><a href="#use-cases-for-containers">Use cases for containers</a></li>
         </ul></div><!--/div.accordion-body-->
@@ -356,7 +358,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Introducing Containers</h1>
-        <p>Last updated on 2024-08-01 |
+        <p>Last updated on 2024-09-16 |
 
         <a href="https://github.com/carpentries-incubator/docker-introduction/edit/main/episodes/introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 
@@ -487,53 +489,31 @@ <h3 class="callout-title">Software and Science</h3>
 containers to the rescue! Containers provide a way to package up
 software dependencies and access to resources such as files and
 communications networks in a uniform manner.</p>
-</section><section><h2 class="section-heading" id="what-is-a-container-what-is-docker">What is a Container? What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-a-container-what-is-docker"></a></h2>
-<hr class="half-width"><p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
-you to build what are called <strong>containers</strong>. It’s not the
-only tool that can create containers, but is the one we’ve chosen for
-this workshop. But what <em>is</em> a container?</p>
-<p>To understand containers, let’s first talk briefly about your
-computer.</p>
-<p>Your computer has some standard pieces that allow it to work – often
-what’s called the hardware. One of these pieces is the CPU or processor;
-another is the amount of memory or RAM that your computer can use to
-store information temporarily while running programs; another is the
-hard drive, which can store information over the long-term. All these
-pieces work together to do the computing of a computer, but we don’t see
-them because they’re hidden from view (usually).</p>
-<p>Instead, what we see is our desktop, program windows, different
-folders, and files. These all live in what’s called the filesystem.
-Everything on your computer – programs, pictures, documents, the
-operating system itself – lives somewhere in the filesystem.</p>
-<p>NOW, imagine you want to install some new software but don’t want to
+</section><section><h2 class="section-heading" id="what-is-a-container">What is a Container?<a class="anchor" aria-label="anchor" href="#what-is-a-container"></a></h2>
+<hr class="half-width"><p>Imagine you want to install some research software but don’t want to
 take the chance of making a mess of your existing system by installing a
 bunch of additional stuff (libraries/dependencies/etc.). You don’t want
 to buy a whole new computer because it’s too expensive. What if,
 instead, you could have another independent filesystem and running
 operating system that you could access from your main computer, and that
 is actually stored within this existing computer?</p>
-<p>Or, imagine you have two tools you want to use in your groundbreaking
-research on cat memes: <code>PurrLOLing</code>, a tool that does
-AMAZINGLY well at predicting the best text for a meme based on the cat
-species and <code>WhiskerSpot</code>, the only tool available for
-identifying cat species from images. You want to send cat pictures to
-<code>WhiskerSpot</code>, and then send the species output to
-<code>PurrLOLing</code>. But there’s a problem: <code>PurrLOLing</code>
-only works on Ubuntu and <code>WhiskerSpot</code> is only supported for
-OpenSUSE so you can’t have them on the same system! Again, we really
-want another filesystem (or two) on our computer that we could use to
-chain together <code>WhiskerSpot</code> and <code>PurrLOLing</code> in a
-<strong>computational pipeline</strong>…</p>
-<p>Container systems, like Docker, are special programs on your computer
-that make it possible! The term container can be usefully considered
-with reference to shipping containers. Before shipping containers were
-developed, packing and unpacking cargo ships was time consuming and
-error prone, with high potential for different clients’ goods to become
-mixed up. Just like shipping containers keep things together that should
-stay together, software containers standardize the description and
-creation of a complete software system: you can drop a container into
-any computer with the container software installed (the ‘container
-host’), and it should <em>just work</em>.</p>
+<p>More concretely, Docker Inc use the following definition of a
+container:</p>
+<blockquote>
+<p>A container is a standard unit of software that packages up code and
+all its dependencies so the application runs reliably from one computing
+environment to another.</p>
+</blockquote>
+<p><a href="https://www.docker.com/resources/what-container/" class="external-link uri">https://www.docker.com/resources/what-container/</a></p>
+<p>The term container can be usefully considered with reference to
+shipping containers. Before shipping containers were developed, packing
+and unpacking cargo ships was time consuming and error prone, with high
+potential for different clients’ goods to become mixed up. Just like
+shipping containers keep things together that should stay together,
+software containers standardize the description and creation of a
+complete software system: you can drop a container into any computer
+with the container software installed (the ‘container host’), and it
+should <em>just work</em>.</p>
 <div id="virtualization" class="callout">
 <div class="callout-square">
 <i class="callout-icon" data-feather="bell"></i>
@@ -554,7 +534,12 @@ <h3 class="callout-title">Virtualization</h3>
 </div>
 </div>
 </div>
-<p>One final term: while the <strong>container</strong> is an
+</section><section><h2 class="section-heading" id="what-is-docker">What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-docker"></a></h2>
+<hr class="half-width"><p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
+you to build and run containers. It’s not the only tool that can create
+containers, but is the one we’ve chosen for this workshop.</p>
+</section><section><h2 class="section-heading" id="container-images">Container Images<a class="anchor" aria-label="anchor" href="#container-images"></a></h2>
+<hr class="half-width"><p>One final term: while the <strong>container</strong> is an
 alternative filesystem layer that you can access and run from your
 computer, the <strong>container image</strong> is the ‘recipe’ or
 template for a container. The container image has all the required
@@ -691,9 +676,9 @@ <h3 class="callout-title">Key Points</h3>
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-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/key-points.html b/instructor/key-points.html
index 08dc67b1..fe05fccc 100644
--- a/instructor/key-points.html
+++ b/instructor/key-points.html
@@ -561,9 +561,9 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/managing-containers.html b/instructor/managing-containers.html
index b0e0cc31..e9d829d5 100644
--- a/instructor/managing-containers.html
+++ b/instructor/managing-containers.html
@@ -644,9 +644,9 @@ <h3 class="callout-title">Key Points</h3>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/managing-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/meet-docker.html b/instructor/meet-docker.html
index bc62c7cd..62e5eb14 100644
--- a/instructor/meet-docker.html
+++ b/instructor/meet-docker.html
@@ -832,9 +832,9 @@ <h3 class="callout-title">Key Points</h3>
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/meet-docker.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/meet-docker.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/profiles.html b/instructor/profiles.html
index 28676858..2a2b98b8 100644
--- a/instructor/profiles.html
+++ b/instructor/profiles.html
@@ -472,9 +472,9 @@ <h1>Learner Profiles</h1>
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/profiles.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/profiles.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/reference.html b/instructor/reference.html
index 65dc1d35..c4b1e0cc 100644
--- a/instructor/reference.html
+++ b/instructor/reference.html
@@ -608,9 +608,9 @@ <h1>Glossary</h1>
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   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/reference.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/reproduciblity.html b/instructor/reproduciblity.html
index 7795c915..bdf935c3 100644
--- a/instructor/reproduciblity.html
+++ b/instructor/reproduciblity.html
@@ -568,7 +568,7 @@ <h3 class="callout-title">Positives and negatives</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This is not an exhaustive list but some of the advantages and
 disadvantages could be:</p>
@@ -706,9 +706,9 @@ <h3 class="callout-title">Key Points</h3>
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   "url": "https://preview.carpentries.org/docker-introduction/instructor/reproduciblity.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/reproduciblity.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/instructor/running-containers.html b/instructor/running-containers.html
index 3a30f51c..58ae2262 100644
--- a/instructor/running-containers.html
+++ b/instructor/running-containers.html
@@ -475,7 +475,7 @@ <h3 class="callout-title">Exercise: Check on Your Images</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>To see if the <code>hello-world</code> container image is now on your
 computer, run:</p>
@@ -618,7 +618,7 @@ <h3 class="callout-title">Hello World, Part 2</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use the same command as above, but with the <code>echo</code> command
 to print a message.</p>
@@ -707,7 +707,7 @@ <h3 class="callout-title">Practice Makes Perfect</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Solution 1 – Interactive </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Run an interactive ubuntu container – you can use
 <code>docker image pull</code> first, or just run it with this
@@ -745,7 +745,7 @@ <h3 class="code-label">BASH<i aria-hidden="true" data-feather="chevron-left"></i
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Solution 2 – Run commands </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>Run a ubuntu container, first with a command to read out the Linux
 version:</p>
@@ -874,9 +874,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/instructor/running-containers.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/instructor/running-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/introduction.html b/introduction.html
index 1c4b1c77..49767085 100644
--- a/introduction.html
+++ b/introduction.html
@@ -217,7 +217,9 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#scientific-software-challenges">Scientific Software Challenges</a></li>
-<li><a href="#what-is-a-container-what-is-docker">What is a Container? What is Docker?</a></li>
+<li><a href="#what-is-a-container">What is a Container?</a></li>
+<li><a href="#what-is-docker">What is Docker?</a></li>
+<li><a href="#container-images">Container Images</a></li>
 <li><a href="#putting-the-pieces-together">Putting the Pieces Together</a></li>
 <li><a href="#use-cases-for-containers">Use cases for containers</a></li>
         </ul></div><!--/div.accordion-body-->
@@ -356,7 +358,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Introducing Containers</h1>
-        <p>Last updated on 2024-08-01 |
+        <p>Last updated on 2024-09-16 |
 
         <a href="https://github.com/carpentries-incubator/docker-introduction/edit/main/episodes/introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 
@@ -485,53 +487,31 @@ <h3 class="callout-title">Software and Science</h3>
 containers to the rescue! Containers provide a way to package up
 software dependencies and access to resources such as files and
 communications networks in a uniform manner.</p>
-</section><section><h2 class="section-heading" id="what-is-a-container-what-is-docker">What is a Container? What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-a-container-what-is-docker"></a></h2>
-<hr class="half-width"><p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
-you to build what are called <strong>containers</strong>. It’s not the
-only tool that can create containers, but is the one we’ve chosen for
-this workshop. But what <em>is</em> a container?</p>
-<p>To understand containers, let’s first talk briefly about your
-computer.</p>
-<p>Your computer has some standard pieces that allow it to work – often
-what’s called the hardware. One of these pieces is the CPU or processor;
-another is the amount of memory or RAM that your computer can use to
-store information temporarily while running programs; another is the
-hard drive, which can store information over the long-term. All these
-pieces work together to do the computing of a computer, but we don’t see
-them because they’re hidden from view (usually).</p>
-<p>Instead, what we see is our desktop, program windows, different
-folders, and files. These all live in what’s called the filesystem.
-Everything on your computer – programs, pictures, documents, the
-operating system itself – lives somewhere in the filesystem.</p>
-<p>NOW, imagine you want to install some new software but don’t want to
+</section><section><h2 class="section-heading" id="what-is-a-container">What is a Container?<a class="anchor" aria-label="anchor" href="#what-is-a-container"></a></h2>
+<hr class="half-width"><p>Imagine you want to install some research software but don’t want to
 take the chance of making a mess of your existing system by installing a
 bunch of additional stuff (libraries/dependencies/etc.). You don’t want
 to buy a whole new computer because it’s too expensive. What if,
 instead, you could have another independent filesystem and running
 operating system that you could access from your main computer, and that
 is actually stored within this existing computer?</p>
-<p>Or, imagine you have two tools you want to use in your groundbreaking
-research on cat memes: <code>PurrLOLing</code>, a tool that does
-AMAZINGLY well at predicting the best text for a meme based on the cat
-species and <code>WhiskerSpot</code>, the only tool available for
-identifying cat species from images. You want to send cat pictures to
-<code>WhiskerSpot</code>, and then send the species output to
-<code>PurrLOLing</code>. But there’s a problem: <code>PurrLOLing</code>
-only works on Ubuntu and <code>WhiskerSpot</code> is only supported for
-OpenSUSE so you can’t have them on the same system! Again, we really
-want another filesystem (or two) on our computer that we could use to
-chain together <code>WhiskerSpot</code> and <code>PurrLOLing</code> in a
-<strong>computational pipeline</strong>…</p>
-<p>Container systems, like Docker, are special programs on your computer
-that make it possible! The term container can be usefully considered
-with reference to shipping containers. Before shipping containers were
-developed, packing and unpacking cargo ships was time consuming and
-error prone, with high potential for different clients’ goods to become
-mixed up. Just like shipping containers keep things together that should
-stay together, software containers standardize the description and
-creation of a complete software system: you can drop a container into
-any computer with the container software installed (the ‘container
-host’), and it should <em>just work</em>.</p>
+<p>More concretely, Docker Inc use the following definition of a
+container:</p>
+<blockquote>
+<p>A container is a standard unit of software that packages up code and
+all its dependencies so the application runs reliably from one computing
+environment to another.</p>
+</blockquote>
+<p><a href="https://www.docker.com/resources/what-container/" class="external-link uri">https://www.docker.com/resources/what-container/</a></p>
+<p>The term container can be usefully considered with reference to
+shipping containers. Before shipping containers were developed, packing
+and unpacking cargo ships was time consuming and error prone, with high
+potential for different clients’ goods to become mixed up. Just like
+shipping containers keep things together that should stay together,
+software containers standardize the description and creation of a
+complete software system: you can drop a container into any computer
+with the container software installed (the ‘container host’), and it
+should <em>just work</em>.</p>
 <div id="virtualization" class="callout">
 <div class="callout-square">
 <i class="callout-icon" data-feather="bell"></i>
@@ -552,7 +532,12 @@ <h3 class="callout-title">Virtualization</h3>
 </div>
 </div>
 </div>
-<p>One final term: while the <strong>container</strong> is an
+</section><section><h2 class="section-heading" id="what-is-docker">What is Docker?<a class="anchor" aria-label="anchor" href="#what-is-docker"></a></h2>
+<hr class="half-width"><p><a href="https://www.docker.com/" class="external-link">Docker</a> is a tool that allows
+you to build and run containers. It’s not the only tool that can create
+containers, but is the one we’ve chosen for this workshop.</p>
+</section><section><h2 class="section-heading" id="container-images">Container Images<a class="anchor" aria-label="anchor" href="#container-images"></a></h2>
+<hr class="half-width"><p>One final term: while the <strong>container</strong> is an
 alternative filesystem layer that you can access and run from your
 computer, the <strong>container image</strong> is the ‘recipe’ or
 template for a container. The container image has all the required
@@ -689,9 +674,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/introduction.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/introduction.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/key-points.html b/key-points.html
index 4e948bef..0ddbbabc 100644
--- a/key-points.html
+++ b/key-points.html
@@ -551,9 +551,9 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/key-points.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/key-points.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/managing-containers.html b/managing-containers.html
index 2e67a1fe..a8581a83 100644
--- a/managing-containers.html
+++ b/managing-containers.html
@@ -642,9 +642,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/managing-containers.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/managing-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/md5sum.txt b/md5sum.txt
index bdf6de74..15ebbe00 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -5,7 +5,7 @@
 "config.yaml" "54be1fabc599404a592c83552a49916f" "site/built/config.yaml" "2024-07-26"
 "index.md" "16a0cc69e6e31090b65bec6484cdf513" "site/built/index.md" "2024-08-16"
 "links.md" "00995287cb95631827a4f30cbe5a7722" "site/built/links.md" "2024-08-16"
-"episodes/introduction.md" "fbd6c719d897bfa342d976928b942d56" "site/built/introduction.md" "2024-08-01"
+"episodes/introduction.md" "e1c010aeee715ad094a1267009200e4f" "site/built/introduction.md" "2024-09-16"
 "episodes/meet-docker.md" "36a6daa2e4727a8ce88db8a4a1a0fa88" "site/built/meet-docker.md" "2024-08-01"
 "episodes/running-containers.md" "4bd40434e9fee516256b848e2a423f5a" "site/built/running-containers.md" "2024-06-27"
 "episodes/managing-containers.md" "cd974b695f6fa04b3042765a827df552" "site/built/managing-containers.md" "2024-06-27"
diff --git a/meet-docker.html b/meet-docker.html
index 06a226d2..b5f4ad64 100644
--- a/meet-docker.html
+++ b/meet-docker.html
@@ -830,9 +830,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/meet-docker.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/meet-docker.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/pkgdown.yml b/pkgdown.yml
index 40694ba4..503facf2 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,4 +2,4 @@ pandoc: 3.1.11
 pkgdown: 2.1.0
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-09-10T01:36Z
+last_built: 2024-09-16T17:56Z
diff --git a/profiles.html b/profiles.html
index 18bba001..0ede0a5b 100644
--- a/profiles.html
+++ b/profiles.html
@@ -472,9 +472,9 @@ <h1>Learner Profiles</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/profiles.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/profiles.html",
-  "dateCreated": "2024-08-16",
-  "dateModified": "2024-09-10",
-  "datePublished": "2024-09-10"
+  "dateCreated": "2024-09-16",
+  "dateModified": "2024-09-16",
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/reference.html b/reference.html
index 600d209f..e00e37db 100644
--- a/reference.html
+++ b/reference.html
@@ -606,9 +606,9 @@ <h1>Glossary</h1>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/reference.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/reference.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-01",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/reproduciblity.html b/reproduciblity.html
index 00c8644e..9c3cbd17 100644
--- a/reproduciblity.html
+++ b/reproduciblity.html
@@ -566,7 +566,7 @@ <h3 class="callout-title">Positives and negatives</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This is not an exhaustive list but some of the advantages and
 disadvantages could be:</p>
@@ -704,9 +704,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/reproduciblity.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/reproduciblity.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-08-16",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>
diff --git a/running-containers.html b/running-containers.html
index bd8098ef..f6d4f29b 100644
--- a/running-containers.html
+++ b/running-containers.html
@@ -473,7 +473,7 @@ <h3 class="callout-title">Exercise: Check on Your Images</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>To see if the <code>hello-world</code> container image is now on your
 computer, run:</p>
@@ -616,7 +616,7 @@ <h3 class="callout-title">Hello World, Part 2</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>Use the same command as above, but with the <code>echo</code> command
 to print a message.</p>
@@ -705,7 +705,7 @@ <h3 class="callout-title">Practice Makes Perfect</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Solution 1 – Interactive </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Run an interactive ubuntu container – you can use
 <code>docker image pull</code> first, or just run it with this
@@ -743,7 +743,7 @@ <h3 class="code-label">BASH<i aria-hidden="true" data-feather="chevron-left"></i
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Solution 2 – Run commands </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>Run a ubuntu container, first with a command to read out the Linux
 version:</p>
@@ -872,9 +872,9 @@ <h3 class="callout-title">Key Points</h3>
   "creativeWorkStatus": "active",
   "url": "https://preview.carpentries.org/docker-introduction/running-containers.html",
   "identifier": "https://preview.carpentries.org/docker-introduction/running-containers.html",
-  "dateCreated": "2024-08-16",
+  "dateCreated": "2024-09-16",
   "dateModified": "2024-06-27",
-  "datePublished": "2024-09-10"
+  "datePublished": "2024-09-16"
 }
 
   </script><script>