Update app.py

app.py

@@ -28,7 +28,7 @@ async def get():
         <input id="msg" type="text">
         <button onclick="send()">Send</button>
         <script>
-            const ws = new WebSocket('ws://' + window.location.host + '/ws');
+            const ws = new WebSocket('wss://' + window.location.host + '/ws');
             ws.onmessage = e => {
                 document.getElementById('chat').innerHTML += 
                     `<div>${e.data}</div>`;