docker 换国内镜像源，docker换源

echo >/etc/docker/daemon.json
cat>/etc/docker/daemon.json <<END
{
  "registry-mirrors": [
    "https://hub-mirror.c.163.com",
    "https://ustc-edu-cn.mirror.aliyuncs.com",
    "https://ghcr.io",
    "https://mirror.baidubce.com"
  ]
}
END
systemctl restart docker