Now comes the fun part! We wantout server to listen to`POST` requests, at`/payload`,

Now comes the fun part! We wantour server to listen to`POST` requests, at`/payload`,

because that's where we told GitHub our webhook URL was. Since ngrok is exposing

our local environment, we don't need to set up a real serversomeone online, and

our local environment, we don't need to set up a real serversomewhere online, and

can happily test out our code locally.

Let's set up a little Sinatra app to do something with the information. Our initial