[Request] NixOS compatibility

[j-cray]

rdt-client performs write operations to its install path as part of preparing downloads, and as part of the download speed test. If running rdt-client as a service on NixOS, this behaviour results in errors because NixOS installs programs to a read-only filesystem. If possible, myself and other Nix users would greatly appreciate an alternative approach - perhaps a working directory at /var/rdt-client - that would allow rdt-client to run natively on NixOS. However, NixOS users can deploy rdt-client in a docker container or use other more advanced Nix wrapping methods to allow the program to function, so please consider this a low-priority request.

See also: #455

What version are you using?
2.0.73

Wat OS are you running?
NixOS (Linux)

Are you using Docker or as a service?
Service

Which debrid provider are you using?

Which downloader are you using?

Please attach a log file here with the log setting set to debug