Add composing notification

Change-Id: I2c052c4395a56ba6acf882cea3be4b82e2fde761
diff --git a/server/src/app.ts b/server/src/app.ts
index ff94a59..0e1b055 100644
--- a/server/src/app.ts
+++ b/server/src/app.ts
@@ -32,6 +32,7 @@
 import { linkPreviewRouter } from './routers/link-preview-router.js';
 import { nameserverRouter } from './routers/nameserver-router.js';
 import { setupRouter } from './routers/setup-router.js';
+import { bindChatCallbacks } from './websocket/chat-handler.js';
 import { bindWebRtcCallbacks } from './websocket/webrtc-handler.js';
 
 @Service()
@@ -59,6 +60,7 @@
     this.app.use('/ns', nameserverRouter);
 
     // Setup WebSocket callbacks
+    bindChatCallbacks();
     bindWebRtcCallbacks();
 
     // Setup 404 error handling