You say simple computer, made me think 🤔
Can it run on a raspberry pi?
And what about internet bandwidth, storage... Can you tell what are the requirements?
The greatest thing about Nostr is how nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 designed it to be uncensorable, because anyone with a simple computer can run your own relay, and publish to it.
Discussion
Yeah, Nostream can run in a raspberry pi with at least 4GB ram. Other relay implementations can as well I’m sure.
Nostr relays are pretty lightweight.