dockerpullubuntu遇到问题如下Errorresponsefromdaemon:Gethttps://registry-1.docker.io/v2/library/ubuntu/manifests/2.04:Gethttps://auth.docker.io/token?scope=repository%3Alibrary%2Fubuntu%3Apull&serviceregistry.docker.io:net/http:TLShandshaketimeout说明访问不到镜像源解决方式通过dig@114.114.114.114registry-1.docker.io找到可用IP