Docker Compose MariaDB

docker-compose.yml

version: '3.1'

services:

  db:
    image: mariadb
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: example
      MYSQL_DATABASE: mydb
      MYSQL_USER: user
      MYSQL_PASSWORD: user
    
    volumes: 
        - ./init:/docker-entrypoint-initdb.d

  adminer:
    image: adminer
    restart: always
    ports:
      - 8080:8080