Add Docker Compose development environment

Author: Hans Kristian Flaatten

.gitignore

@@ -25,3 +25,5 @@ build/Release
 # Dependency directory
 # https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
 node_modules
+
+.env

docker-compose.yml

@@ -0,0 +1,10 @@
+dev:
+  image: iojs:2
+  working_dir: /usr/src/app
+  volumes:
+    - ".:/usr/src/app"
+  command: "npm run watch"
+  env_file: .env
+  environment:
+    - NTB_API_ENV=dev
+    - NTB_USER_AGENT=turbasen.js/alpha