Update app.py

app.py

@@ -116,5 +116,5 @@ with gr.Blocks(css=css) as demo:
     generate_button.click(deliver_request,
                           inputs=[style_input, desc_input],
                           outputs=[img_output1, img_output2, img_output3, img_output4])
-
-demo.launch()
+demo.queue(concurrency_count=3)
+demo.launch(enable_queue=True)