Docs for config.dhall

[andy-bell101]

I've been trying to find a description of what can be specified in the config.dhall for cachix and I haven't been able to find much. Seems you can specify a hostname and that's about it. Is there some obvious place I haven't looked? If not, might be a feature request

[sandydoo]

Yeah, the schema is roughly:

{ authToken : Text
, hostname : Text
, binaryCaches: List { name : Text, secretKey : Text }
}

At some point, I'd like to:

1. drop dhall
2. allow setting all the CLI options here
3. pick up local configs