Update app.py

app.py

@@ -68,7 +68,7 @@ def upload():
 
 @app.route('/uploads/<path:filename>')
 def uploaded_file(filename):
-    user_upload_folder = os.path.join(app.config['UPLOAD_FOLDER'], session['user_id'])
+    user_upload_folder = os.path.join('/tmp/uploads', session['user_id'])
     return send_from_directory(user_upload_folder, filename)
 
 if __name__ == '__main__':