docker镜像源配置
{"registry-mirrors": ["https://r9xxm8z8.mirror.aliyuncs.com","https://registry.docker-cn.com","http://f1361db2.m.daocloud.io"]}
{"registry-mirrors": ["https://r9xxm8z8.mirror.aliyuncs.com","https://registry.docker-cn.com","http://f1361db2.m.daocloud.io"]}