Ansible : 
	- Manage ssh (public) keys
		- create a borg-specific .ssh conf folder in /data/borg/.ssh 
		- run borg with BORG_RSH="/bin/ssh -F configfile"
	- create borg users everywhere
	- set up cron job
	- update the /data/borg/config/borg-conf.env with new hosts ?

Docker :
	- something, probably.

DONE
manage multiple backup hosts (stop overwriting the conf', dumbie)
	- could be done neatly with a yml conf file
	- maybe also check around ~/.ssh/ssh_config if it could be done ?

Quickfix : use the same passphrase for a repo on each of its locations (hosts)