Config languages (and Dhall)

Thank you a lot for the tip. I’ve replaced my Dockerfile’s generator suite from bunch of YAMLs + Jinja (Ginger) template + the templating executable in Haskell to a bunch of Nickel files and a trivial shell script, resulted in a way smaller footprint, instant feedback and types out of the box instead of JSON schema; all of that with a single configuration language. Couldn’t recommend it enough. Seems like the sweet spot to me as well.