upd docker file

app.py

@@ -1598,7 +1598,7 @@ with gr.Blocks(title="Paper2ProjectPage Generator", theme=gr.themes.Soft(), css=
             section_display_json,
             template_choice,
             template_preview_links,
-            section_feedback_input
+            # section_feedback_input
         ]
     )
     
@@ -1646,10 +1646,13 @@ with gr.Blocks(title="Paper2ProjectPage Generator", theme=gr.themes.Soft(), css=
             html_file_output
         ]
     )
+    def dummy_open_preview(url):
+        """Dummy function to pass URL to JavaScript"""
+        return None
     
     # Open Preview Button - Use JavaScript to open in new tab
     open_preview_btn.click(
-        fn=None,
+        fn=dummy_open_preview,
         inputs=[preview_url_state],
         outputs=None,
         js="(url) => window.open(url, '_blank')"