add a docker-compose.yaml

Author: jarrodu

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
-ruby '2.3.1'
-gem 'jekyll', '3.5.2'
+
+gem 'jekyll'
 gem 'kramdown'
 gem 'rack-jekyll'
 gem 'rake'

docker-compose.yaml

@@ -0,0 +1,13 @@
+version: "2"
+services:
+  scala-lang:
+    command: jekyll serve --incremental
+    image: jekyll/jekyll:latest
+    volumes:
+      - $PWD:/srv/jekyll
+      - $PWD/vendor/bundle:/usr/local/bundle
+    ports:
+      - 4000:4000
+      - 35729:35729
+      - 3000:3000
+      -   80:4000