docker-compose-phpadmin.yml

 version: '2'

 services:
         db:        
           image: "mysql:latest"
           restart: always
           expose:
            - 3306
           environment:
                MYSQL_ROOT_PASSWORD: teste123
         phpmyadmin:
           image: "phpmyadmin/phpmyadmin"
           restart: always
           ports:
            - 8080:80
           environment:
                MYSQL_USERNAME: root
                MYSQL_ROOT_PASSWORD: teste123
                PMA_HOST: mysql
           links:
            - db:mysql