It depends on the users needs, but a Pi is absolutely sufficient enough for a private relay to store your own notes and events. I wouldn't co-mingle the two services though, for security purposes.
Discussion
Is there a video or something how to set up ?
I don't know, sorry. I setup my relay manually.
Ime,, pis usually die just from running docker; if I were to run my relay in a pi I’d do it straight on the metal and skip docker altogether.
Would the hw in a pi allow for a private relay on top of ie umbrel (that is running full node and lightning)?
yes, it would. though, i wouldn't recommend it. i don't like mixing bitcoin with other applications for security purposes.
So umbrel app store is a bad take on the personal server set up?
Its really practical though.
It’s really practical, sure, but they have many applications that are resource dependent and/or is far too security compromising to really recommend past your first/initial node, learning about how these systems work.