version: "3.7"
services:
  web:
    build:
      context: .
      target: dev
    command: rails server -p 3000 -b 0.0.0.0
    depends_on:
      - db
    environment:
      - DATABASE_URL=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}
    ports:
      - ${WEB_HOST_PORT}:3000
    volumes:
      - type: bind
        source: .
        target: /app
    working_dir: /app

  db:
    environment:
      - POSTGRES_USER
      - POSTGRES_PASSWORD
    image: postgres:11.2-alpine
    ports:
      - ${DB_HOST_PORT}:5432
    volumes:
      - postgres-persisted-volume:/var/lib/postgresql/data

volumes:
  postgres-persisted-volume: