====== Docker inside LXC ======

Set these options in LXC VS config:
  lxc.apparmor.profile = generated
  lxc.apparmor.allow_nesting = 1

On bullseye docker fails anyway. 
Follow the Doker guide to install latest Version > 20.10.5

https://docs.docker.com/engine/install/debian/

Test: 
  docker run hello-world

Win! :)