Example compose file for WordPress & MariaDB

docker-compose.yml

version: '2'
services:
  wordpress:
    image: wordpress
    ports:
      - 8080:80
    environment:
      WORDPRESS_DB_PASSWORD: Password123!
    restart: always
    depends_on:
      - mysql
  mysql:
    image: mariadb
    environment:
      MYSQL_ROOT_PASSWORD: Password123!
    restart: always
    volumes:
      - wordpress1vol:/var/lib/mysql
volumes:
  wordpress1vol:
    driver: local