Add Docker development environment

README.md

@@ -139,3 +139,5 @@ Redoc.init('http://petstore.swagger.io/v2/swagger.json', {
 - Start the server
 `npm start`
 - Open `http://localhost:9000`
+
+Alternatively, Docker can be used by just running `docker-compose up`.

docker-compose.yml

@@ -0,0 +1,8 @@
+dev:
+  image: node:7
+  command: sh -c "npm install; npm start -- --host=0.0.0.0"
+  ports:
+   - "9000:9000"
+  volumes:
+   - "./:/code"
+  working_dir: /code