Update app.py

For ease of private usage, a duplicate button has been added.
I have used a bit of blocks API and have also added some css to center the button.

app.py

@@ -231,6 +231,7 @@ def gradio_generate(prompt, steps, guidance):
     return output_filename
 
 
+title="Mustango: Toward Controllable Text-to-Music Generation"
 description_text = """
 <p><a href="https://huggingface.co/spaces/declare-lab/mustango/blob/main/app.py?duplicate=true"> <img style="margin-top: 0em; margin-bottom: 0em" src="https://bit.ly/3gLdBN6" alt="Duplicate Space"></a> For faster inference without waiting in queue, you may duplicate the space and upgrade to a GPU in the settings. <br/><br/>
 Generate music using Mustango by providing a text prompt.
@@ -246,12 +247,21 @@ output_audio = gr.Audio(label="Generated Music", type="filepath")
 denoising_steps = gr.Slider(minimum=100, maximum=200, value=100, step=1, label="Steps", interactive=True)
 guidance_scale = gr.Slider(minimum=1, maximum=10, value=3, step=0.1, label="Guidance Scale", interactive=True)
 
+# CSS styling for the Duplicate button
+css = '''
+#duplicate-button {
+  margin: auto;
+  color: white;
+  background: #1565c0;
+  border-radius: 100vh;
+}
+'''
+
 # Gradio interface
 gr_interface = gr.Interface(
     fn=gradio_generate,
     inputs=[input_text, denoising_steps, guidance_scale],
     outputs=[output_audio],
-    title="Mustango: Toward Controllable Text-to-Music Generation",
     description=description_text,
     allow_flagging=False,
     examples=[
@@ -265,6 +275,11 @@ gr_interface = gr.Interface(
     cache_examples=False,
 )
 
+with gr.Blocks(css=css) as demo:
+    title=gr.HTML(f"<h1><center>{title}</center></h1>")
+    dupe = gr.DuplicateButton(value="Duplicate Space for private use", elem_id="duplicate-button")
+    gr_interface.render()
+   
+
 # Launch Gradio app
-gr_interface.queue()
-gr_interface.launch()
+demo.queue().launch()