version: "3.8"
services:
  db:
    image: postgres:13
    environment:
      POSTGRES_DB: visitors
      POSTGRES_USER: visitor_user
      POSTGRES_PASSWORD: secret
    volumes:
      - db_data:/var/lib/postgresql/data
      - ./db.sql:/docker-entrypoint-initdb.d/db.sql   # ← auto‑run migration

  web:
    build: .
    environment:
      DB_HOST: db
      DB_PORT: 5432
      DB_NAME: visitors
      DB_USER: visitor_user
      DB_PASS: secret
    ports:
      - "8080:80"
    depends_on:
      - db

volumes:
  db_data: