Update app.py

app.py

@@ -599,4 +599,4 @@ with gr.Blocks(theme=purple_theme, css=custom_css) as demo:
     refresh_btn.click(fn=get_debug_info, inputs=[session_id_state], outputs=debug_view)
 
 if __name__ == "__main__":
-    demo.launch()
+    demo.queue(default_concurrency_limit=3).launch()