https://docs.docker.com/install/linux/docker-ce/ubuntu/

******** Docker Engine - Community

$ sudo apt remove docker docker-engine docker.io containerd runc
$ sudo apt update
$ sudo apt install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo apt-key fingerprint 0EBFCD88

$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
$ sudo apt update

$ sudo apt install docker-ce docker-ce-cli containerd.io
$ sudo docker run hello-world

$ docker -v
Docker version 19.03.2, build 6a30dfc

$ sudo groupadd docker
$ sudo usermod -a -G docker soh

// check group
$ vi /etc/group