docker-install-ubuntu-18.04

docker-install-ubuntu1804.md

   sudo apt 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 update
   apt-cache policy docker-ce
   sudo apt install docker-ce
   sudo systemctl status docker
   sudo usermod -aG docker ${USER}
   su - ${USER}