flatcar linux toolbox command

This is not toolbox or toolbx. It is a small shell script wrapping ctr and systemd-nspawn.

sudo ctr images unmount /var/lib/toolbox/core-docker.io_library_fedora-latest/
sudo rm -rf /var/lib/toolbox/*
sudo ctr snapshots rm /var/lib/toolbox/core-docker.io_library_fedora-latest
sudo ctr images prune --all