Update demo to use Webpack

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:6.9
+FROM node:6
 MAINTAINER Paris Kasidiaris <paris@sourcelair.com>
 
 # Set the working directory
@@ -6,7 +6,7 @@ WORKDIR /usr/src/app
 
 # Set an entrypoint, to automatically install node modules
 ENTRYPOINT ["/bin/bash", "-c", "if [[ ! -d node_modules ]]; then npm install; fi; exec \"${@:0}\";"]
-CMD ["npm", "run", "dev"]
+CMD ["npm", "run", "start"]
 
 # First, install dependencies to improve layer caching
 COPY package.json /usr/src/app/