docker镜像加速

# 创建目录
$ sudo mkdir -p /etc/docker
# 把内容追加到文件中
$ sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn"
  ]
}
EOF

# 重启
$ sudo systemctl daemon-reload
$ sudo systemctl restart docker