In this really short article you can find the few commands you need to complete installing Docker on your Debian server.
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add - sudo -i apt install apt-transport-https apt-key fingerprint 0EBFCD88 echo "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable" >> /etc/apt/sources.list apt update apt install docker-ce
Now you installed Docker, click here to find out how to create a Docker cluster aka swarm.