Clarify config file for helm/kubernetes implementation

I'm (attempting) to write a Helm chart for Copyparty, and as such, a full explanation of the config file (or just a config with every possible option configured to something, with a note of whether it accepts multiple arguments or just one, and if they can be ranges would be REALLY helpful.

The motivation is that my student project wants to move away from our old, slow, clunky windows share, and Copyparty looks like the perfect solution, and we simultaneously want to move everything into a kubernetes cluster (for which we need a Helm config, since everything else is managed with Helm and ArgoCD)