add duplicate spaces badge

app.py

@@ -18,6 +18,13 @@ if __name__=="__main__":
         # Make the header of the demo website
         gr.HTML(HTML_header)
 
+        gr.HTML("""
+    <p>For faster inference without waiting in queue, you may duplicate the space and upgrade to GPU in settings.
+    <br/>
+    <a href="https://huggingface.co/spaces/pix2pix-zero-library/pix2pix-zero-demo?duplicate=true">
+    <img style="margin-top: 0em; margin-bottom: 0em" src="https://bit.ly/3gLdBN6" alt="Duplicate Space"></a>
+    <p/>""")
+
         with gr.Row():
             # col A: the input image or synthetic image prompt
             with gr.Column(scale=2) as gc_left: