$ sudo apt-get update
$ sudo apt install apt-transport-https ca-certificates curl software-properties-common
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"
$ sudo apt-get update
$ apt-cache policy docker-ce
$ sudo apt install docker-ce
$ sudo systemctl status docker
$ sudo usermod -aG docker $USER