Setting up RailsTutorialApp

$ git clone https://github.com/yasslab/sample_apps.git
$ mkdir rails_tutorial_modify
$ cp -p sample_apps/5_1_2/ch14/* rails_tutorial_modify/
$ rm -rf sample_apps

Setting up MySQL

commit 4227d07

Setting up database.yml

commit e16db1a

Setting up Dockerfile

commit 4989f97

Setting up docker-compose.yml

commit c261cc0

Install RuboCop

commit 9ba11c1

Useful Commands

$ docker system df
$ docker system prune -a --volumes