To Build an App
This should be done everytime you change the Gemfile or do something that would force you to restart the Rails Sever
rake docker:build /path/to/app
To Run an App
After the app has be built, you can run it with:
rake docker:run /path/to/app
To Stop all Running Containers and then Remove all Containers
Be careful, because this will remove all your Docker Containers, not just the ones run from the commands above
rake docker:cleanup