Defined User Credentials

[InAnimaTe]

It would be nice to have a way to define user credentials via environment variables passed at runtime i.e. RTOR_USER and RTOR_PASS.

Additionally, I think it would be nice to have the option for persistent credentials through a file sitting in the root of the data volume. Also, it would be nice to also store rutorrent settings for a specific user in the same data volume.

I'll post more on this later as I've had to do persistent credentials in my own container.