Update app.py

app.py

@@ -119,7 +119,7 @@ async def execute_command(websocket, project_name, command, connected):
         async def send_message(message):
             print('sending msg')
             # await websocket.send(f'data: {message}')
-            websockets.broadcast(connected,json.dumps(message) )
+            websockets.broadcast(connected,json.dumps(message.decode('utf-8')) )
 
         async for line in process.stdout:
             print('sending line')