It is very easy to install docker in your seedbox server.
Copy paste the script on the right column of this article to set it up on your server. The process should be similar for all distros.
Steps that are executed by this script are:
Installing the requirements for docker.
Get latest docker install script from main repo and install docker
sudo apt update && sudo apt upgrade sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common bash -c "$(curl -fsSL https://get.docker.com)" sudo reboot