Update app.py

app.py

@@ -274,7 +274,5 @@ def main():
             run_command_button.click(execute_command, inputs=command_input, outputs=command_output)
             preview_button.click(preview_project, outputs=project_output)
 
-    demo.launch()
-
 if __name__ == "__main__":
-    main()
+    main(demo.launch())