basically u create an file in ts , for a basic api ingest-data , that expectsa post request with the exact json values declared in that ingest-data code , for ex lets say u want to add a +1 call metric everytime ur webhook gets posted by vapi , u create a http request in the app to post totalCalls 1 , to ur server , and u need to create adashboard to show the metric correctly from the firestore db