docker

Install Docker on Linux Mint 20.3

1. Update the apt package index and install packages to allow apt to use a repository over HTTPS:

sudo apt-get update
sudo apt-get install ca-certificates curl gnupg

Remove all everything not used by at least one container - Prune everything

docker system prune

Note : If you are on Docker 17.06.1 or higher and want to also prune volumes, add the --volumes flag:
docker system prune --volumes