experiential summary: set server_port & server_name

[baiyutang]

Gradio is the fastest way to demo your machine learning model with a friendly web interface so that anyone can use it, anywhere!

we can check their website building-demos:

• Can be set by environment variable GRADIO_SERVER_PORT. If None, will search for an available port starting at 7860.
• Can be set by environment variable GRADIO_SERVER_NAME. If None, will use "127.0.0.1".