It should also report the syntax and so on, and actually you want a way to directly modify configuration values. So if you think this through, you will end up with something like https://www.libelektra.org
FYI I get a security error when going to the https of your site. I get an Apache message when going to http. Can't wait to check it out though once it's up!
As already written by others, the article does not go very deep and is missing many essentials. What I was mostly missing is more about keeping configuration parameters as simple as possible. A much more detailed best practices can be found here: https://www.libelektra.org/ftp/elektra/slides/cm/