真的无法找到原因, film_api容器中进去以后来断开无法测试, 然后在film_nginx容器安装了mysql客户端工具, 进行连接能连上, 外网连接全都能连, 启动应用就报错
failed to initialize database, got error Error 1045 (28000): Access denied for user 'root'@'172.18.0.4' (using password: YES)
panic: Error 1045 (28000): Access denied for user 'root'@'172.18.0.4' (using password: YES)