per #1074 (review) above

@jorgeorpinel / @shcheklein is there any way to automatically get these preview URLs in the CI? That way we could set them as the CHECK_LINKS_RELATIVE_URL (rather than https://dvc.org).

Idk, maybe the Heroku integration exposes some env vars but probably not worth the effort. I can ignore it, it's just always confusing at first, and you need to check the test results every time after this to make sure nothing else is failing.

@casperdcl I think so, the problem is that we'll have to make CI script wait before we run it (for Heroku preview to be deployed)? may be we can make a separate GH action or something?

First of all we can set predictable URLs - https://devcenter.heroku.com/articles/github-integration-review-apps#selecting-the-url-pattern . Then just pull the main page with some (10 min?) timeout.

sounds good; updated #1000

closing in favor of #1367