Update try.md

Add link to full web app

docs/try.md

@@ -20,6 +20,8 @@ menu: overview
 
 This example application is developed with [Angular](https://angular.io). The backend is based on RESTHeart's [Change Streams](https://restheart.org/docs/mongodb-websocket) to provide an instant, zero lines of code API for a realtime chat application. In turn, RESTHeart leverages MongoDB's Change Streams to instantly notify clients about database modifications through WebSockets.
 
+Below there's the demo app (full web app available at [chat.restheart.org](https://chat.restheart.org)), choose a nickname to start:
+
 <iframe src="https://chat.restheart.org" width="100%" height="600px" title="restheat-ng-demo"></iframe>
 
 {: .bs-callout.bs-callout-info}