Check for broken links
This adds a script to check for broken links. I used markdown-link-check
to help with this: https://www.npmjs.com/package/markdown-link-check
It just checks URLs and relative links (including images) directly in the markdown, so there's no need to start up Hugo locally.
The main downside is that it checks every single link, every time. I wasn't sure how to make this lighter-weight. Any ideas?
Edited by Jared Kosanovic