Ok, I hadn't realised that the helper script installs docker. I thought LXC was an alternative to docker.
Regarding the VM option, I did think of doing just that but read a lot about it using too many resources with frigate and LXC seems to be more efficient option when it comes to resources
What i read here is concerning. Non that i was getting into the swing of drocker .... :-( Is LXC the future then?