We did attempt at one point, but it is a bit cumbersome to get all the dependencies into debian as well. As everything is platform independent, I would like to just supply all libraries in the correct versions, but that does not really play well with Debian’s package policy.
I have wanted to setup a PPA for some time, but never gotten around to it. That would also make it possible to provide timely updates.
Before starting the service, run the server with a password command:
duplicati-server --webservice-password=secure-password
Wait a few seconds til it has started, then CTRL+C it and when you start it as a service, it has the password you supplied.