Home Assistant Operating System: Minimal Operating System optimized to power Home Assistant. It comes with Supervisor to manage Home Assistant Core and Add-ons. Recommended installation method
It needs to be installed because the addon is a docker container. Whenever you change the contents of the container (e.g. by installing a package) it is ephemeral. In other words if the container restarts, it reverts to what is in the image. Which doesn’t include the ephemeral bits.
Right, I was hoping to skip that issue when I went for PI install and dropped running it on my Synology in docker, but it is fine, the SMB share gave me access to the config files and Im still just testing things to see how I’m able to make the jump from fibro HC3, and my Zvave USB yet to arrive from Eur