try whitelisting asset directory

app.py

@@ -30,8 +30,9 @@ contains more than 100K cells, embeddings will be
 computed only for the first 100K cells.
 """
 
-# set up output directory
+# set up directories
 OUTPUT_DIR = Path("./outputs")
+ASSETS_DIR = Path("./assets")
 OUTPUT_DIR.mkdir(exist_ok=True, parents=True)
 
 # load symbol-to-ensembl mapping
@@ -418,4 +419,4 @@ with gr.Blocks(title=APP_TITLE) as demo:
     evt.then(ensure_dropdowns, inputs=[f_in], outputs=[layer_dd, var_dd, obs_dd], queue=False)
 
 if __name__ == "__main__":
-    demo.launch(allowed_paths=[str(OUTPUT_DIR.resolve())], max_file_size="5gb")
+    demo.launch(allowed_paths=[str(OUTPUT_DIR.resolve()), str(ASSETS_DIR.resolve())], max_file_size="5gb")