add support for public link

app.py

@@ -42,7 +42,7 @@ def respond(
 """
 For information on how to customize the ChatInterface, peruse the gradio docs: https://www.gradio.app/docs/chatinterface
 """
-demo = gr.ChatInterface(
+athena = gr.ChatInterface(
     respond,
     additional_inputs=[
         gr.Textbox(
@@ -75,4 +75,4 @@ demo = gr.ChatInterface(
 
 
 if __name__ == "__main__":
-    demo.launch()
+    athena.launch(share=True)