fix the downlad path

app.py

@@ -196,7 +196,7 @@ async def download_file(filename: str):
     """
     Endpoint to download generated files
     """
-    file_path = f".{filename}"
+    file_path = f"./{filename}"
     if os.path.exists(file_path):
         return FileResponse(file_path, media_type="application/json", filename=filename)
     raise HTTPException(status_code=404, detail="File not found")