So, this will allow each branch/preview to have its own base URL instead of the default one of the main site (getbootstrap.com).
It shouldn't affect anything in theory, since on Netlify's robots.txt has indexing blocked.
Ideally, we should backport this to v4-dev, but I'm not sure how easy it'll be, if at all possible. I will look into backporting it when I have some time.
Refs #29949 (closed)
Preview: https://deploy-preview-30214--twbs-bootstrap.netlify.com/