DISCLAIMER: DO NOT USE THIS CODE THIS WAS FOR TESTING PURPOSES ONLY, I STORE PRIVATE KEYS UNENCRYPTED KEYS IN THE DATABASE AND WEB ENDPOINTS ARE NOT PROTECTED BY ANY SORT OF AUTHENTICATION
Messing around with ActivityPub, needed a way to generate activitypub profiles/messages dynamically (they do not need authentication because none of them are real users), primarily used to test this minetest activitypub bridge https://github.com/TomCasavant/MinetestActivityPub/
Relevant blog post: https://tomcasavant.com/experimenting-with-activitypub-minetest-activitypub-bridge/