services:
  db:
    image: mysql:8.0
    volumes:
      - "db-data:/var/lib/mysql"
    restart: always
    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_general_ci
    hostname: "${MYSQL_HOST:-db}"
    environment:
      MYSQL_ROOT_PASSWORD: "${DOCKER_MYSQL_PASSWORD:-rooter}"
      MYSQL_DATABASE: "${DOCKER_MYSQL_NAME:-catter}"
    ports:
      - "${DOCKER_EXPOSED_MYSQL_PORT:-16306}:3306"

volumes:
  db-data:
    external: true
    name: catter-db-data