add link checker to CI tests
Since we already have the whole website process building in gitlab-ci, it would be very useful to also have a link checker included as an automatic test. It would be nicer if the link checker could run before the deploy, but it might have to run after deploying to gitlab.io in order to be accurate.
Here's one version of this idea: http://matthieukeller.com/2017/03/building-this-blog-with-travis.html
Edited by username-removed-24982