Update app.py

app.py

@@ -105,6 +105,8 @@ with gr.Blocks(
         * Running on [Gradio](https://www.gradio.app) v{gr.__version__}
         """)
 
+        gr.DuplicateButton()
+
     btn.click(
         generate,
         inputs=[prompt, seed, randomize_seed, width, height],