fixed sh command mistake
added node to dockerfile
preparing node and postgres
got stuck with gem and ruby commands not found after install
using ruby:2.1.2 as base
docker builds but does not run detached
using rails image
dockerfile goes in rails app dir
added app files to git
added docker commands for reference temporarily
renamed to readme, with good commands
commands working for single built app
test new docker build
updated readme markup
updated readme markup
Merge branch 'John-Dev' of github.com:jphager2/docker-rails-env into John-Dev

Conflicts:
	README.md
readme using correct md code block
default app directory overrides new app creation
added docker tricks to readme
cleaned up commands in readme