FROM docker/official

Build the project

docker-compose run web rails new . --force --no-deps --database=postgresql

If you are running Docker on Linux, the files rails new created are owned by root.

sudo chown -R $USER:users .

Connect the database

echo "" > config/database.yml

vi config/database.yml

Replace the contents of config/database.yml with the following:

default: &default
  adapter: postgresql
  encoding: unicode
  host: db
  username: postgres
  password:
  pool: 5

development:
  <<: *default
  database: myapp_development


test:
  <<: *default
  database: myapp_test

docker-compose build

docker-compose up

Finally, you need to create the database. In another terminal, run:

docker-compose run web rake db:create

Enjoy!

You can now boot the app with:

sudo chown -R $USER:users tmp/*

docker-compose up