docker 镜像加速，修改为阿里云镜像

首先访问 登录阿里云 https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors，会获取专属的镜像地址

centos用户执行下列操作即可

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["自己的镜像地址"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker