完整错误：

SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client

docker-compose.xml

mysql:
    image: mysql:8.0
    volumes:
      - ./mysql/data:/var/lib/mysql
      - ./mysql/my.cnf:/etc/mysql/conf.d/my.cnf
    ports:
      - 3306:3306
    env_file:
      - ./.env

my.cnf

innodb_buffer_pool_size = 16M
innodb_additional_mem_pool_size = 2M
innodb_log_file_size = 5M
innodb_log_buffer_size = 8M

PHP版本是7.1