How to use the filesystem to generate links?

[redonkulus]

I'm following the Folders with Index Pages document to add index pages for my site. On this index page, I would like to create links automatically to the sub-pages based on the pages in the file system.

When trying to use the fs Node.js library, the build system breaks (as Webpack cannot compile the fs library). Is there another way to access the file system to generate these links automatically?

An example from the Nextra docs where they hardcode the links to the directory pages, I'd like to avoid hardcoding the links: https://github.com/shuding/nextra/blob/main/docs/pages/docs/docs-theme.mdx#L14