Register for messages on the serviceWorker property I guess

app/routes/_index.tsx

@@ -96,9 +96,8 @@ function TackUpNow({
   const [messages, setMessages] = useState<any[]>([])
 
   useEffect(() => {
-    window.addEventListener("message", (event) =>
+    navigator.serviceWorker.onmessage = (event) =>
       setMessages((prev) => [...prev, JSON.stringify(event.data)])
-    )
   }, [])
 
   return (