This is more a question than an issue

Currently, the installed PostgreSQL version is not determined explicitly with a variable. Shouldn't a variable added? I ask the question as I have an app version installed early 2020 with PostgreSQL v12. However, I provisioned another server in October and I saw that PostgreSQL installed version is v13 while I was willing to have the same installation.

I can obviously modify my forked version but I was willing to have your views guys on the topic.

Thanks, Jean-Pierre.