version: '3'
services:
  mariadb:
    image: mariadb:latest
    container_name: mariadb
    restart: unless-stopped
    environment:
      - MYSQL_ROOT_PASSWORD=$DB_ROOT_PASSWD
      - MYSQL_DATABASE=$DB_NAME
      - MYSQL_USER=$DB_USER
      - MYSQL_PASSWORD=$DB_PASSWD
    ports:
      - $DB_PORT:3306

  redis:
    image: redis:alpine
    container_name: redis
    command:
    # - /bin/sh
    # - -c
    # # - Double dollars, so that the variable is not expanded by Docker Compose
    # # - Surround by quotes, so that the shell does not split the password
    # # - The ${variable:?message} syntax causes shell to exit with a non-zero
    # #   code and print a message, when the variable is not set or empty
    # - redis-server --requirepass "$${REDIS_PASSWORD:?REDIS_PASSWORD variable is not set}"
    restart: unless-stopped
    ports:
      - ${REDIS_PORT}:6379
    env_file:
      - .env