Thank you! The votes on my post suggest there are a few people interested in this, so I might eventually write a small blog post on this. Running the resulting

Thank you! The votes on my post suggest there are a few people interested in this, so I might eventually write a small blog post on this. Running the resulting container in Proxmox was actually the reason why my colleague needed the container to start with lxc-start rather than lxc-execute. The process involves finding the init system in the container and setting up lxc.init.cmd rather than lxc.execute.cmd, which is set by lxc-create. We have not yet investigated whether it might be possible to automate this for the majority of cases, but this is something we might look at in the future.