docker-compose通过容器名连接mysql

这是Mysql的配置： version :'3' services:   desneyMysql:     container_name: app_mysql     image: mysql:5.7     build:       context:./mysql     ports: -"3307:3306"     volumes: -./mysql/conf:/etc/mysql/conf.d -./mysql/logs:/logs -./mysql/data:/var/lib/mysql     command:[ 'mysqld', '--innodb-buffer-pool-size=80M', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci', '--default-time-zone=+8:00', '--lower-case-table-names=1' ]     environment:       MY...