Using fs on an MDX based page

[samrobbins85]

I'm wanting to add a Navbar to the top of an MDX based page. But I want to generate the links in this navbar automatically, using the fs module. However, the only way I can see to add content to an MDX based page is by wrapping it in a component in _app.js, and components can't access fs, only pages can. Is there a way to do this?