Provide nginx configuration for Phabricator containers

Summary:
Phabricator requires some entries:

• main application
• static content
• Phame domaines (blogs)

This configuration takes care of all of them, based on
the various devcentral.naqueron.org entries on Dwellers.

Ref T1422

Test Plan:

1. salt equatower state.sls_id /etc/nginx/vhosts/phabricator/devcentral.conf roles/paas-docker/nginx/config
2. nginx -t
3. Browse https://devcentral.nasqueron.org and https://servers.nasqueron.org
4. Check redirect at http://serveur.nasqueron.org

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1422

Differential Revision: http://devcentral.nasqueron.org/D1722