I’ve added the Portainer add-on to my HA version 104.1 in an intel NUC running in Docker.
Upon starting Portainer, I can see in the overview I have 17 containers where 1 is stopped.
Thanks @Markus99 but that guide is for a standalone Portainer install (which of course I could use) but wanted to move it from standalone to be part of my HA as an addon.