[georgyo]

The install instructions still explicitly lists docker engine as container runtime.

https://kubernetes.io/docs/setup/production-environment/cont...

The dockershim removal FAQ says how to continue to use docker engine.

https://kubernetes.io/blog/2022/02/17/dockershim-faq/

-- Linux container could be LXC, systemd-nspawn, snap, flatpak, nixos-container, and many many many other things.

That's because Linux containers are built on Linux interfaces, but Linux itself does not have any prescriptive requirements on how to stich them together.