Add a succesful event for testing the application
Following up from #121 (closed) and !109 (comment 598355686) we need a test for processing an event successfully.
Technically the service is up but fails to process any payload event from what I can tell
🙈 up but we never test a real payload anywhere.
Yes I think we're using the Rack app in a wrong way and it'll only break when it reaches to that point