Merge branch 'deployment' into impl-202

Dockerfile

 FROM ruby:2.2.3-onbuild
 
-RUN apt-get update && apt-get upgrade -y
-RUN apt-get install nodejs -y
+RUN apt-get update && apt-get install nodejs -y
 
 EXPOSE 5000
-CMD bundle exec rails server -p $PORT -e $RACK_ENV
+CMD ["/usr/src/app/docker-entrypoint.sh"]
+
+VOLUME ["/usr/src/app/public/assets","/usr/src/app/public/system"]

docker-entrypoint.sh

+#!/usr/bin/env bash
+bundle exec rails server -p 5000 -e production