Docker镜像下载及加速器设置

docker远程仓库配置：

vim ~/.docker/daemon.json

{
"registry-mirrors" : [
"https://registry.docker-cn.com",
"https://docker.mirrors.ustc.edu.cn",
"http://hub-mirror.c.163.com",
"https://cr.console.aliyun.com/"
]
}