卸載舊版本
sudo apt-get remove docker docker-engine docker.io
設置允許https
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
添加官方GPG
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
更新apt
sudo apt-get update
安裝docker
sudo apt-get install docker-ce
運行docker
sudo docker run hello-world
