version: '3'
services:
  mariadb:
    container_name: some-mariadb
    environment:
      - MARIADB_DATABASE=database
      - MARIADB_USER=example-user
      - MARIADB_PASSWORD=my_cool_secret
      - MARIADB_ROOT_PASSWORD=my-secret-pw
    volumes:
      - '/my/own/datadir:/var/lib/mysql'
    image: 'mariadb:latest'