moving insert to another model and done so in database internal

main.go

@@ -50,6 +50,7 @@ func main() {
 
 	// Revenue
 	http.HandleFunc("POST /add/revenue/entry", handlers.AddRevenueEntryHandler(db))
+	http.HandleFunc("POST /api/v1/revenue/add", handlers.AddRevenueEntryHandler(db))
 
 	//http.HandleFunc("GET /revenue/report", handlers.GetRevenueReportHandler(db))