Highly recommend having some scripting/interpreted language in your stack -- in fact you likely already do (consider how shell scripting makes up a significant part of Dockerfiles)

It's an incredibly useful intermediate between freeform-but-non-executable text/docs/wikis and "industrial-grade"-but-inflexible tooling

In other words, a great fit for capturing this partial/incomplete/tribal knowledge space the post is talking about. I personally even go a bit further and actively advocate for converting "onboarding/operational docs" from wikis into scripts that print out the equivalent text that can be committed and incrementally automated.