Update app.py

app.py

@@ -2018,7 +2018,8 @@ def create_sb3_archive(project_folder, project_id):
     Returns:
         str: The path to the created .sb3 file, or None if an error occurred.
     """
-    output_filename = os.path.join("outputs", project_id)
+    # output_filename = os.path.join("outputs", project_id)
+    output_filename = OUTPUT_DIR / project_id
     zip_path = None
     sb3_path = None
     try: