1，更新apt库
sudo apt update
2，以下安装使得允许apt通过HTTPS使用存储库
sudo apt install apt-transport-https ca-certificates curl software-properties-common
3，添加阿里GPG秘钥
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add –
4，添加阿里docker源
sudo add-apt-repository “deb [arch=amd64] https:
