frankfurter/docker-compose.yml

version: '3'
services:
  db:
    container_name: db
    image: postgres:11
    volumes:
      - data:/var/lib/postgresql/data
  web:
    container_name: app
    command: bundle exec unicorn -c config/unicorn.rb
    entrypoint: bin/wait-for-it.sh db:5432 -s --
    environment:
      DATABASE_URL: postgres://postgres@db/postgres
    expose:
      - '8080'
    links:
      - db
volumes:
  data: