docker配置镜像加速

1.问题

解决docker镜像拉取慢

2. 示例

{"registry-mirrors": ["https://xxx.mirror.aliyuncs.com"(阿里云镜像加速),"https://xxx.mirror.swr.myhuaweicloud.com"（华为云镜像加速）,"https://do.nark.eu.org","https://dc.j8.work","https://docker.m.daocloud.io","https://dockerproxy.com","https://docker.mirrors.ustc.edu.cn","https://docker.nju.edu.cn"]
}