services:
  app:
    environment:
      MYSQL_HOST: db
      MYSQL_PORT: 3306
    depends_on:
      db:
        condition: service_healthy

  db:
    image: mysql:8.4
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-root-password}
      MYSQL_DATABASE: ${MYSQL_DATABASE:-app}
      MYSQL_USER: ${MYSQL_USER:-app}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD:-change-me}
    command:
      - --character-set-server=utf8mb4
      - --collation-server=utf8mb4_unicode_ci
    ports:
      - "${MYSQL_PORT:-3306}:3306"
    volumes:
      - mysql-data:/var/lib/mysql
    healthcheck:
      test: ["CMD-SHELL", "mysqladmin ping -h 127.0.0.1 -u$${MYSQL_USER} -p$${MYSQL_PASSWORD} --silent"]
      interval: 10s
      timeout: 5s
      retries: 10

volumes:
  mysql-data: