Updating the front end JS to call paymentIntent handler

cmd/api/routes-api.go

@@ -18,6 +18,6 @@ func (app *application) routes() http.Handler {
 		MaxAge:           300,
 	}))
 
-	mux.Get("/api/payment-intent", app.GetPaymentIntent)
+	mux.Post("/api/payment-intent", app.GetPaymentIntent)
 	return mux
 }