Added /d as /dashboards alias

[pjnovas]

@impronunciable that change is only for Rest API, I think adding a redirect into the site would do the trick: https://github.com/impronunciable/hackdash/commit/b3da79351ecec60fdd83ae54d48403b19c210159

I'm gonna update the client-share links with this short redirect and push to production soon.

[impronunciable]

True that