If you don't know who's gonna merge your Pull Request - Oraclocat knows!
Oraclocat needs a Github Application for its authentication system to work: register a Github application here. The authorization callback URL must point to http(s)://yourdomain/callback.
You may want to create a seperate app for your development box and define http://localhost:9292/callback as the auth callback.
Copy .env-sample to .env and put your Client Id and Client Secret in there. Do not put the file under version control (it's in .gitignore).
rackup config.ru will launch the app at localhost:9292.