Allow specifying a config file to load and use once

[TangentFoxy]

Instead of requiring a central config be changed in between different usages, allowing one to specify an alternate config to use would be helpful.

(Related: #25)

[arzkar]

Hey sorry for the late reply, was busy with IRL work.
I am not adding new features right now unfortunately, too busy.
If you know enough python, feel free to open a PR.
You can join our discord if you wanna chat about this.