{"message":"LED Scroller API is running (demo / Step 0)","service":"ledscroller-api","version":"0.0.1-demo","phase":"demo","endpoints":{"health":"/health","demo":"/demo","paymentPlaceholders":{"createCheckout":"POST /checkout/create-session (not implemented yet)","verifyUnlock":"POST /verify/unlock-token (not implemented yet)","stripeWebhook":"POST /webhooks/stripe (not implemented yet)"}},"docs":"See README.md in led-signboard-app-BE repo"}