Update app.js

app.js

@@ -26,7 +26,7 @@ const {
 } = process.env;
 
 // choose which secret to use (dev/demo by default)
-const PAYSTACK_SECRET = PAYSTACK_DEMO_SECRET; // PAYSTACK_LIVE_SECRET;
+const PAYSTACK_SECRET = PAYSTACK_LIVE_SECRET; // PAYSTACK_DEMO_SECRET
 
 if (!PAYSTACK_SECRET) {
   console.warn('WARNING: PAYSTACK_SECRET is not set. Outgoing Paystack calls and webhook verification will fail.');