Add local Jekyll environment.

.gitignore

@@ -1,3 +1,4 @@
 .vscode
 tmp
 _site
+Gemfile.lock

Gemfile

@@ -0,0 +1,25 @@
+source "https://rubygems.org"
+# gem "jekyll", "~> 4.3.3"
+# This is the default theme for new Jekyll sites. You may change this to anything you like.
+# gem "minima", "~> 2.5"
+# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
+# uncomment the line below. To upgrade, run `bundle update github-pages`.
+gem "github-pages", "~> 232", group: :jekyll_plugins
+# If you have any plugins, put them here!
+group :jekyll_plugins do
+  gem "jekyll-feed", "~> 0.12"
+end
+
+# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+# and associated library.
+platforms :mingw, :x64_mingw, :mswin, :jruby do
+  gem "tzinfo", ">= 1", "< 3"
+  gem "tzinfo-data"
+end
+
+# Performance-booster for watching directories on Windows
+gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+
+# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
+# do not have a Java counterpart.
+gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]

README.md

@@ -1,7 +1,19 @@
 # 16n website
 
 We need a website, fast, if only to answer the question _what is this thing
-I have seen on the internet?_ Ta-da!	
+I have seen on the internet?_ Ta-da!
+
+## Working on the website locally
+
+It's a Github Pages / Jekyll site, so you'll need a Ruby toolchain with `bundler` installed. Then, from this directory:
+
+    bundle install
+
+And then, to run a local server with the site on:
+
+    bundle exec jekyll serve
+
+This will spin up a server at port 4000 on `localhost`. Note that it's not hot-reloading; if you update a markdown file, you'll need to reload your browser.
 
 ## Updating the editor
 

_config.yml

@@ -7,3 +7,5 @@ exclude:
 include:
   - _*.js
   - _*.css
+github:
+  is_project_page: false