Update app.py

I don't get how this works

app.py

@@ -152,6 +152,7 @@ with gr.Blocks() as demo:
             )
     with gr.Row():
         with gr.Column():
+            file_output = gr.File()
             gr.Markdown("If you already benchmarked your model using the [Docker file](https://github.com/huggingface/EnergyStarAI/) provided, please upload the **entire run log directory** (in .zip format) below:")
             u = gr.UploadButton("Upload a zip file with logs", file_count="single")
             u.upload(add_docker_eval,u, file_output)