Anyone looking to use jails might find BastileBSD helpful. It's a nice and modern jail manager.

I was looking at TrueNAS CORE to see if it was a viable way to bsd-jail Linux containers. I'm really only doing this to get some protection from supply chain attacks given I'm fairly promiscuous at git-clone-and-run-a-build. Before that I was aiming for the same with Bastille and had got to the give up stage because it felt too fiddly to set up. This was a year ago. Maybe its better now