Development environments and deps.edn projects

Suggestions on how to run a deps.edn project for different environments (dev, test, pre-prod, production)

call to clj using normal shell methods
use CLJ_CONFIG to define different configurations
https://ask.clojure.org/index.php/8440/equivalent-of-leiningens-managed-dependencies-in-deps-edn
https://github.com/ajoberstar/ClojureTools/issues/1

deps.edn alias
one option is to create an alias that adds an :extra-paths and then load config via a resource
an alias can also set Java system properties
so those are two paths to have an alias add extra config
be careful that you're not putting sensitive values in your deps.edn
have a system property that point to a file (or env var) to read a sensitive value

https://direnv.net/
direnv is an extension for your shell. It augments existing shells with a new feature that can load and unload environment variables depending on the current directory.

Review the linked ask.clojure.org and ClojureTools discussions, along with the listed CLJ_CONFIG, deps.edn alias, system-property, and direnv approaches. Document practical guidance for dev, test, pre-production, and production environments, including how to keep sensitive values out of deps.edn; completion should leave a clear, actionable section for readers.