Enable GitLab Pages

We only want to support custom domains for a start, ex: conf.archlinux.org

mentioned in merge request !163 (closed)

assigned to @klausenbusk

So far candidates can be:

• conf.archlinux.org
• archlinux.org/pacman now generated with a playbook (playbooks/tasks/pacman-website.yml)

• whatcanidofor.archlinux.org (asknot-ng)
  • Eg. https://whatcanidoforfedora.org/ and https://whatcanidoformozilla.org/

mentioned in commit 203356f4

mentioned in merge request !181 (merged)

assigned to @svenstaro

unassigned @klausenbusk

mentioned in commit c7774473

mentioned in commit 99b0fbc9

mentioned in commit 4644cf11

mentioned in commit d97c7b3c

closed with merge request !181 (merged)

closed with commit 4644cf11