Think about a good way to hook-up `config` and TypeScript types

[birdofpreyru]

See this: https://github.com/funny-bytes/node-config-typescript-example

That story implies that node-config may load and process all content of /config folder, and if so — we should avoid it!

Also, in general, we need a solution for typing of config files.

[birdofpreyru]

Checked, config does not scan sub-dirs of config dir recursively, thus no issue on that front.