Duplicati service user

[layus]

Issue description

Currently, the duplicati service runs with it's own user. As a backup program, it makes it quite useless to backup other user's data.

There seems to be some traction to implement a multi-users duplicati server. In the meanwhile, duplicati should run as a user service (systemd --user)

If the current behavior is the intended behavior, this should be aded to the documentation of the duplicati service. Something like

Duplicati runs as it's own user. It will only be able to backup world-readable files.

Another option is to allow changing the user that runs the service, or run it as root (may no be such a perfect idea either...)

/cc @nyanloutre

[domenkozar]

I've pushed e8916cc and I'm using root to run the backup as I need to do cross-user backups.

I believe duplicati should run the backup under root, but web under normal user, but that's an upstream issue.

[stale]

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