Added try/catch and the callback back in transport-produce

app.js

@@ -167,6 +167,15 @@ peers.on('connection', async socket => {
       router[callId].close()
       delete router[callId]
     })
+
+    try {
+      // Send back to the client the Producer's id
+      callback({
+        id: producer.id
+      })
+    } catch (error) {
+      console.log(`ERROR | transport-produce | ${error}`)
+    }
   })
 
   // see client's socket.emit('transport-recv-connect', ...)