definition of configuration environment variable from https://docs.cekit.io/en/latest/descriptor/module.html#environment-variables :

The primary difference to [ information environment variables ] is the lack of a value definition. Every configuration environment variable should provide an example usage (example) and short description (description).

At the moment we define description/example/value, meaning it's treated as an "informational environment variable", which cekit describes as

In most cases such environment variables should not be modified.

We should remove the value key so it is treated as a configuration environment variable.