Before starting the memo, you must install docker.
sudo apt-get updatesudo apt-get install -y apt-transport-https ca-certificates curl software-properties-commoncurl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key addsudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"sudo apt-get updatesudo apt-get install -y docker-cedocker -vsudo service docker startsudo docker run hello-world
Before starting the memo, you must install docker.
