Add docker-compose file

Just to make it easier to do development without installing all the jekyll stuff yourself.

All you need is docker+docker-compose and run 'docker-compose up' in the root of the project.

Gemfile

@@ -18,6 +18,7 @@ gem "github-pages", group: :jekyll_plugins
 # If you have any plugins, put them here!
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.6"
+  gem "jekyll-livereload"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem

docker-compose.yml

@@ -0,0 +1,9 @@
+
+jekyll:
+    image: jekyll/jekyll
+    command: jekyll serve --livereload --reload_port 35729
+    ports:
+        - 4000:4000
+        - 35729:35729
+    volumes:
+        - .:/srv/jekyll