What does it do? I can't figure it out.

The article is a short summary and listing of a recently published package on npm called "hyper-nostr." The package is intended to be used as a relay for Nostr clients, with instructions on how to install and run it. It currently only has NIP-01, NIP-20, and NIP-45 implemented, and has no keywords. The package has been downloaded 1,383 times a week and was last published 11 hours ago.