Update app.py

app.py

@@ -2021,7 +2021,7 @@ def sitemap():
 app = gr.mount_gradio_app(app, demo, path="/")
 
 if __name__ == "__main__":
-    port = int(os.environ.get("PORT", 7860))
+    port = int(os.environ.get("GRADIO_SERVER_PORT", os.environ.get("PORT", 7860)))
     
     demo.launch(
         server_name="0.0.0.0",