diff --git a/.env_sample b/.env_sample
index 26c9337bd..b3f62d157 100644
--- a/.env_sample
+++ b/.env_sample
@@ -16,8 +16,8 @@ MAX_EXECUTION_TIME_LIMIT=600 # time limit for the default queue (in seconds)
 DOMAIN_NAME=localhost:80
 
 # SSL style domain definition
+TLS_EMAIL=your@email.com
 # DOMAIN_NAME=example.com:443
-# TLS_EMAIL=your@email.com
 
 RABBITMQ_HOST=rabbit
 RABBITMQ_DEFAULT_USER=rabbit-username
diff --git a/Caddyfile b/Caddyfile
index 49d03f690..8b31649fb 100644
--- a/Caddyfile
+++ b/Caddyfile
@@ -1,29 +1,35 @@
 {$DOMAIN_NAME} {
-  # HTTPS options:
+  # HTTPS Options
   tls {$TLS_EMAIL}
 
+
   # Test HTTPS setup
   # tls {$TLS_EMAIL} {
   #   ca https://acme-staging-v02.api.letsencrypt.org/directory
   # }
 
+  
   # Removing some headers for improved security:
-  header / -Server
+  header -Server
 
   # Serves static files, should be the same as `STATIC_ROOT` setting:
-  root /var/www/django
-
-  # Serving dynamic requests:
-  proxy / django:8000 {
-    except /static /media
-    transparent
-    websocket
+  root *  /var/www/django
+  file_server
+  
+  @noStatic {
+    not path /static/*
+    not path /media/*
   }
+  
+  # Serving dynamic requests:
+  reverse_proxy @noStatic django:8000
 
   # Allows to use `.gz` files when available:
-  gzip
+  encode gzip
 
   # Logs:
-  log stdout
-  errors stdout
+  log {
+    output stdout
+    format console
+  }
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index 08e7a5c84..75fe7c448 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,14 +4,15 @@ services:
   #   Web Services
   #-----------------------------------------------
   caddy:
-    image: abiosoft/caddy:1.0.3
+    image: caddy:2.7.6
     env_file: .env
     environment:
       - ACME_AGREE=true
     volumes:
-      - ./Caddyfile:/etc/Caddyfile
+      - ./Caddyfile:/etc/caddy/Caddyfile
       - ./src/staticfiles:/var/www/django/static
-      - ./certs/caddy:/etc/caddycerts
+      - ./caddy_data:/data
+      - ./caddy_config:/config
     restart: unless-stopped
     ports:
       - 80:80
@@ -42,8 +43,8 @@ services:
     tty: true
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
 
 
   #-----------------------------------------------
@@ -99,8 +100,8 @@ services:
     restart: unless-stopped
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
 
 
   #-----------------------------------------------
@@ -120,8 +121,8 @@ services:
     restart: unless-stopped
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
 
   #-----------------------------------------------
   #   Rabbitmq & Flower monitoring tool
@@ -148,8 +149,8 @@ services:
     restart: unless-stopped
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
 
   flower:
     # image: mher/flower
@@ -166,8 +167,8 @@ services:
       - rabbit
     logging:
         options:
-            max-size: "20k"
-            max-file: "10"
+            max-size: "20m"
+            max-file: "5"
 
   #-----------------------------------------------
   #   Redis
@@ -179,8 +180,8 @@ services:
     restart: unless-stopped
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
 
   #-----------------------------------------------
   #   Celery Service
@@ -200,8 +201,8 @@ services:
     restart: unless-stopped
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
+        max-size: "20m"
+        max-file: "5"
     deploy:
       resources:
         limits:
@@ -230,5 +231,5 @@ services:
       - CODALAB_IGNORE_CLEANUP_STEP=1
     logging:
       options:
-        max-size: "20k"
-        max-file: "10"
\ No newline at end of file
+        max-size: "20m"
+        max-file: "5"
diff --git a/src/apps/competitions/models.py b/src/apps/competitions/models.py
index 48c26bec4..2e0cb7336 100644
--- a/src/apps/competitions/models.py
+++ b/src/apps/competitions/models.py
@@ -261,8 +261,10 @@ def save(self, *args, **kwargs):
             pass
         elif not self.logo_icon:
             self.make_logo_icon()
+            self.save()
         elif os.path.dirname(self.logo.name) != os.path.dirname(self.logo_icon.name):
             self.make_logo_icon()
+            self.save()
         to_create = User.objects.filter(
             Q(id=self.created_by_id) | Q(id__in=self.collaborators.all().values_list('id', flat=True))
         ).exclude(id__in=self.participants.values_list('user_id', flat=True)).distinct()
diff --git a/src/static/riot/competitions/detail/_tabs.tag b/src/static/riot/competitions/detail/_tabs.tag
index 1a9769790..6c3fff6f8 100644
--- a/src/static/riot/competitions/detail/_tabs.tag
+++ b/src/static/riot/competitions/detail/_tabs.tag
@@ -33,7 +33,7 @@
                                  data-tab="_tab_page_term">
                                 Terms
                             </div>
-                            <div class="{active: _.get(competition.pages, 'length') === 0} item" data-tab="files">
+                            <div  if={competition.files.length != 0} class="{active: _.get(competition.pages, 'length') === 0} item" data-tab="files">
                                 Files
                             </div>
                         </div>
diff --git a/src/static/riot/competitions/detail/submission_upload.tag b/src/static/riot/competitions/detail/submission_upload.tag
index 75ecc8b2f..49fe64f01 100644
--- a/src/static/riot/competitions/detail/submission_upload.tag
+++ b/src/static/riot/competitions/detail/submission_upload.tag
@@ -61,7 +61,7 @@
                     <select name="organizations" id="organization_dropdown" class="ui dropdown">
                         <option value="None">Yourself</option>
                         <option each="{org in organizations}" value="{org.id}">{org.name}</option>
-                        <option if="{_.size(organizations) === 0}" value="add_organization">+ Add New Organizaiton</option>
+                        <option if="{_.size(organizations) === 0}" value="add_organization">+ Add New Organization</option>
                     </select> 
                     
                 </div>
diff --git a/src/templates/emails/base_email.html b/src/templates/emails/base_email.html
index 903e75e33..9ea0c1a89 100644
--- a/src/templates/emails/base_email.html
+++ b/src/templates/emails/base_email.html
@@ -7,23 +7,33 @@
     <title></title>
 
     <style>
-        /*
-
-        text: #666666
-        links: #739cb9
-
-        palette medium: #7A8D92
-         palette light: #A6C6D1
-          palette teal: #67B8C7
-        */
         html, body {
             font-size: 18px;
             line-height: 28px;
             background-color: #f7f7f7;
             font-family: "Helvetica Neue", "Helvetica", Helvetica, Arial, sans-serif;
         }
-        body {
-            /*padding: 20px;*/
+        .container {
+            width: 100%;
+            max-width: 600px;
+            margin: auto;
+            border: 1px solid #dddddd;
+	        background-color: #ffffff;
+        }
+        .header_img {
+            width: 40%;
+        }
+        .header {
+            width: 100%;
+            background-color: #2D3E4C;
+            min-height: 110px;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            margin-bottom: 10px;
+        }
+        .content{
+            padding: 20px;
         }
         h1 {
             font-size: 41px;
@@ -57,6 +67,7 @@
             color: #ccc;
             font-size: 11px;
             line-height: 18px;
+            text-align: center;
         }
         blockquote {
             color: #555555;
@@ -78,10 +89,10 @@
     </style>
 </head>
 <body>
+<div class = "container">
+<div class = "content">
+<h3>Hello{% if user %} {{ user.username }}{% endif %},</h3>
 
-<div id="header">
-    <h1>Hello{% if user %} {{ user.username }}{% endif %},</h1>
-</div>
 
 {% block title %}
 {% endblock %}
@@ -92,13 +103,16 @@ <h1>Hello{% if user %} {{ user.username }}{% endif %},</h1>
 {% if not mass_email %}
 <div id="signature">
     <p>Thanks,</p>
-
     <p>Codabench Team</p>
+    <div class = "header">
+        <img class = "header_img" src = "../../static/img/codabench.png" alt = "codabench_logo" />
+    </div>
 </div>
 {% endif %}
-
+</div>
 <div id="footer">
     <p><a href="http://{{ site.domain }}">Unsubscribe or manage notification settings</a> | <a href="https://github.com/codalab/codalab-competitions/wiki/Privacy">Privacy policy</a></p>
 </div>
+</div>
 </body>
 </html>
diff --git a/src/templates/emails/participation/organizer/participation_accepted.html b/src/templates/emails/participation/organizer/participation_accepted.html
index 703744f68..f25d3dfc9 100644
--- a/src/templates/emails/participation/organizer/participation_accepted.html
+++ b/src/templates/emails/participation/organizer/participation_accepted.html
@@ -1,9 +1,6 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>The user {{ participant.user.username }} was accepted into your competition:</p>
-    <a href="http://
-            {{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
-
-    <p>Participants can be managed from the admin tab of your competition</p>
+    <p>We're writing to inform you that user {{ participant.user.username }} has been accepted into your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/organizer/participation_accepted.txt b/src/templates/emails/participation/organizer/participation_accepted.txt
index 4d1669e44..f25d3dfc9 100644
--- a/src/templates/emails/participation/organizer/participation_accepted.txt
+++ b/src/templates/emails/participation/organizer/participation_accepted.txt
@@ -1,8 +1,6 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-The user {{ participant.user.username }} was accepted into your competition:
-{{ participant.competition.title }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
-
-Participants can be managed from the admin tab of your competition
+    <p>We're writing to inform you that user {{ participant.user.username }} has been accepted into your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/organizer/participation_denied.html b/src/templates/emails/participation/organizer/participation_denied.html
index 5eb320e01..43ec224c0 100644
--- a/src/templates/emails/participation/organizer/participation_denied.html
+++ b/src/templates/emails/participation/organizer/participation_denied.html
@@ -1,9 +1,6 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>The user {{ participant.user.username }} was denied permission to your competition:</p>
-    <a href="http://
-            {{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
-
-    <p>Participants can be managed from the admin tab of your competition.</p>
+<p>We're writing to inform you that user {{ participant.user.username }} has been denied to your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/organizer/participation_denied.txt b/src/templates/emails/participation/organizer/participation_denied.txt
index babba7aac..43ec224c0 100644
--- a/src/templates/emails/participation/organizer/participation_denied.txt
+++ b/src/templates/emails/participation/organizer/participation_denied.txt
@@ -1,8 +1,6 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-The user {{ participant.user.username }} was revoked permission to your competition:
-{{ participant.competition.title }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
-
-Participants can be managed from the admin tab of your competition
+<p>We're writing to inform you that user {{ participant.user.username }} has been denied to your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/organizer/participation_requested.html b/src/templates/emails/participation/organizer/participation_requested.html
index 87b79dbf3..dad10d911 100644
--- a/src/templates/emails/participation/organizer/participation_requested.html
+++ b/src/templates/emails/participation/organizer/participation_requested.html
@@ -1,8 +1,6 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>The user {{ participant.user.username }} requested access to your competition:</p>
-    <a href="http://
-            {{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
-    <p>Participants can be managed from the admin tab of your competition</p>
+<p>We're writing to inform you that user {{ participant.user.username }} has requested access to your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/organizer/participation_requested.txt b/src/templates/emails/participation/organizer/participation_requested.txt
index e72c1b72a..dad10d911 100644
--- a/src/templates/emails/participation/organizer/participation_requested.txt
+++ b/src/templates/emails/participation/organizer/participation_requested.txt
@@ -1,8 +1,6 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-The user {{ participant.user.username }} requested access to your competition:
-{{ participant.competition.title }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
-
-Participants can be managed from the admin tab of your competition
+<p>We're writing to inform you that user {{ participant.user.username }} has requested access to your competition
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>.You can manage all participants from the admin panel of your competition.</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/participant/participation_accepted.html b/src/templates/emails/participation/participant/participation_accepted.html
index 3db6a7e9b..27a0ddfd9 100644
--- a/src/templates/emails/participation/participant/participation_accepted.html
+++ b/src/templates/emails/participation/participant/participation_accepted.html
@@ -1,8 +1,11 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>This is a message updating your access to the competition:</p>
+    <p>We're thrilled to inform you that your application for the
     <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
-
-    <p>Your status has been accepted!</p>
+    competition has been <b>accepted</b>. Get ready to showcase your skills and compete with other talented individuals.</p>
+    <p>We look forward to seeing your participation.</p>
 {% endblock %}
+
+
+
diff --git a/src/templates/emails/participation/participant/participation_accepted.txt b/src/templates/emails/participation/participant/participation_accepted.txt
index 04a0f8702..27a0ddfd9 100644
--- a/src/templates/emails/participation/participant/participation_accepted.txt
+++ b/src/templates/emails/participation/participant/participation_accepted.txt
@@ -1,9 +1,11 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-This is a message updating your access to the competition:
-{{ participant.competition.title }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
+    <p>We're thrilled to inform you that your application for the
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
+    competition has been <b>accepted</b>. Get ready to showcase your skills and compete with other talented individuals.</p>
+    <p>We look forward to seeing your participation.</p>
+{% endblock %}
+
 
-Your status has been accepted!
 
-{% endblock %}
diff --git a/src/templates/emails/participation/participant/participation_denied.html b/src/templates/emails/participation/participant/participation_denied.html
index 8a08d054f..23d4701be 100644
--- a/src/templates/emails/participation/participant/participation_denied.html
+++ b/src/templates/emails/participation/participant/participation_denied.html
@@ -1,9 +1,14 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>This is a message updating your access to the competition:</p>
+    <p>We're writing to inform you about your application for the
     <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
-
-    <p>Your participation privileges have been denied.</p>
+    competition. While your application was carefully considered, we regret to inform you that your participation privileges 
+    have been denied. We encourage you to review the competition details and rules to see if there are areas where you can 
+    improve your application for future competitions. </p>
+    <p>Thank you for your interest in the competition. We wish you the best of luck in your future endeavors.
+    </p>
 
 {% endblock %}
+
+
diff --git a/src/templates/emails/participation/participant/participation_denied.txt b/src/templates/emails/participation/participant/participation_denied.txt
index 13e72711e..23d4701be 100644
--- a/src/templates/emails/participation/participant/participation_denied.txt
+++ b/src/templates/emails/participation/participant/participation_denied.txt
@@ -1,9 +1,14 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-This is a message updating your access to the competition:
-{{ participant.competition.title }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
-
-Your participation privileges have been denied.
+    <p>We're writing to inform you about your application for the
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
+    competition. While your application was carefully considered, we regret to inform you that your participation privileges 
+    have been denied. We encourage you to review the competition details and rules to see if there are areas where you can 
+    improve your application for future competitions. </p>
+    <p>Thank you for your interest in the competition. We wish you the best of luck in your future endeavors.
+    </p>
 
 {% endblock %}
+
+
diff --git a/src/templates/emails/participation/participant/participation_requested.html b/src/templates/emails/participation/participant/participation_requested.html
index 3e1f98098..582d174b5 100644
--- a/src/templates/emails/participation/participant/participation_requested.html
+++ b/src/templates/emails/participation/participant/participation_requested.html
@@ -1,8 +1,12 @@
 {% extends 'emails/base_email.html' %}
 
 {% block content %}
-    <p>This is a message confirming you have requested access to the competition:</p>
+    <p>Thanks for your interest in the
     <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
+    competition. We have received your request to participate.</p>
 
-    <p>You will be notified if your participation status is approved or denied.</p>
+    <p>We will carefully review your application and notify you by email regarding your participation status (accepted or denied).
+    In the meantime, you can review the competition details and rules to familiarize yourself with the challenge. </p>
+    
+    <p>We look forward to your participation!</p>
 {% endblock %}
diff --git a/src/templates/emails/participation/participant/participation_requested.txt b/src/templates/emails/participation/participant/participation_requested.txt
index 2a208fe0b..582d174b5 100644
--- a/src/templates/emails/participation/participant/participation_requested.txt
+++ b/src/templates/emails/participation/participant/participation_requested.txt
@@ -1,8 +1,12 @@
-{% extends 'emails/base_email.txt' %}
+{% extends 'emails/base_email.html' %}
 
 {% block content %}
-This is a message confirming you have requested access to the competition:
-{{ participant.competition }} -> http://{{ site.domain }}{{ participant.competition.get_absolute_url }}
+    <p>Thanks for your interest in the
+    <a href="http://{{ site.domain }}{{ participant.competition.get_absolute_url }}">{{ participant.competition.title }}</a>
+    competition. We have received your request to participate.</p>
 
-You will be notified if your participation status is approved or denied.
+    <p>We will carefully review your application and notify you by email regarding your participation status (accepted or denied).
+    In the meantime, you can review the competition details and rules to familiarize yourself with the challenge. </p>
+    
+    <p>We look forward to your participation!</p>
 {% endblock %}