Update app.py

app.py

@@ -79,7 +79,7 @@ def status():
     return jsonify({'runtime': uptime, 'memory': f'{memory_free} / {memory_total}'})
 
 # Handle 404 errors
-@app.errorhandler(40)
+@app.errorhandler(404)
 def page_not_found(e):
     return send_from_directory(static_dir, '404.html'), 404