Deploys a EteSync server. EteSync is a cross-platform project to provide secure, end-to-end encrypted, and privacy respecting sync for your contacts, calendars and tasks.

Note that the role only sets up the "API" server without the user web interface that can be used to edit contacts and calendars in a browser. Therefore, after the setup is completed, you will need to use a EteSync client program to work with the service. The only "graphical" interface provided is the administration web interface, that you can use to manage EteSync users (available under /admin).