This page does not use getInitialProps.
It is a static page.
It is never server-side rendered.
It is served directly by Netlify's CDN.

But it has a dynamic URL parameter: /static/:id.
Try changing the ID. It will always render this page, no matter what you put.
I am not sure what this is useful for.
But it's a feature of NextJS, so... I'm supporting it.