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Plain systemd can run docker containers, and keep them up if they crash. (Yes, systemd can be a useful thing sometimes!)

Also, Docker and Podman know how to restart containers if needed, depending on a policy you set.

If you want something even smaller, take https://github.com/containers/bubblewrap or https://github.com/arachsys/containers and run them under the process monitor of your choice, like runit or s6.

Simplest form is `docker run --restart=unless-stopped` and `systemctl enable docker`

They will restart when crash, and after reboot.

Docker and kubernetes are different things.

But both systems can restart crashed containers. That's not an issue at all. Kubernetes does it automatically. Docker does not do it automatically but you just need to supply proper option for `run` (or just in docker-compose.yaml).