The other solutions includes using scripts or systemd and i felt a docker plugin would make it more easier than everyone using their own custom scripts or adding some systemd voodoo.
I wrote this because i was frustrated at Linux boot times when i forgot to stop all my running containers and excessive use of power when i forgot (or often negelect) my running docker containers.
I had similar issues about not stopping them. What I did for my sandboxing scripts was terminate the docker when no sessions were alive anymore. However, it still drains power when you’re actively using it (ssh, vscode).