The footer of the theme has a Contribute link.
Most current jsdoc projects seem to have this as an empty link, because env.conf.templates.wmf.repository is not set. I think we shouldn't output an empty link if that value is not provided, and I also think we should make it so that jsdoc generation throws a warning if that template variable isn't set.
Project with a working Contribute link: https://doc.wikimedia.org/unicodejs/master/js/
Acceptance criteria
- Make sure core has a working "contribute" link
- Only output the link if env.conf.templates.wmf.repository is set
- Throw a warning on build if it's not set