version: '2'
services:
  psql:
    image: postgres:9.6
    environment:
      - POSTGRES_PASSWORD=
      - POSTGRES_USER=root
  app:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/app
    ports:
      - "3000:3000"
    depends_on:
      - psql
    environment:
      - PSQL_HOST=psql