Docker compose for mysql and admier

docker-compose.yml

version: "2.1"

mysql:
    image: mysql:5.7
    restart: always
    ports: 
      -  '3307:3306'
    container_name: dev-mysql
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: database
    volumes:
      - mysql:/var/lib/mysql
mysql-admin:
    image: adminer:4
    ports:
      - 8080:8080
    restart: always
    container_name: dev-mysql-admin
    environment:
      ADMINER_DEFAULT_SERVER: mysql
volumes:
  mysql: