Update app.py

app.py

@@ -17,7 +17,9 @@ with gr.Blocks() as demo:
     gr.Button("Ping").click(ping, outputs=out)
 
 # /predict is registered first, so it still takes priority over the Gradio page at "/"
-app = gr.mount_gradio_app(app, demo, path="/")
+# ssr_mode=False: Spaces enable SSR via env var, which spawns a Node server
+# that grabs 7860 before uvicorn can.
+app = gr.mount_gradio_app(app, demo, path="/", ssr_mode=False)
 
 
 def send_zerogpu_startup_report() -> None: