# Docker Compose file for MySQL (Alpine)
#
# Usage:
#   docker compose up -d
#
# Environment variables (see .env.example for details):
#   MYSQL_ROOT_PASSWORD - Root password (default: mysql)
#   MYSQL_DATABASE      - Database created on first start (default: mysql)
#   MYSQL_USER          - Additional user created on first start (default: root)
#   MYSQL_PASSWORD      - Password for the additional user (default: mysql)

services:
  mysql:
    # For available image tags, see https://hub.docker.com/_/mysql
    image: mysql:8-alpine
    container_name: mysql
    environment:
      # Root password.
      # Default value is for local development only — change for production.
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD:-mysql}
      # Database created automatically on first start.
      - MYSQL_DATABASE=${MYSQL_DATABASE:-mysql}
      # Additional user created automatically on first start.
      - MYSQL_USER=${MYSQL_USER:-root}
      # Password for the additional user.
      # Default value is for local development only — change for production.
      - MYSQL_PASSWORD=${MYSQL_PASSWORD:-mysql}
    ports:
      # Map host port 3306 to container port 3306 (MySQL default).
      - "3306:3306"
    volumes:
      # Persist data beyond container lifetime.
      - mysql_data:/var/lib/mysql

volumes:
  mysql_data: