Migration plan is first to update database to last Phabricator version's schema, then to migrate it to Docker.
On Ysul:
- launch the Phabricator on nginx/php-fpm as it's in /var/wwwroot/wolfplex.be/phabricator
- upgrade Phabricator
- update the database
- export database content
On Dwellers:
- create a new Docker instance of yesnault/docker-phabricator
- import database content