Guys, about Continuous Integration/Delivery using SVN as repo... What is the best approach? It would be nice if it could trigger the files that should come to prod by commit message or something like that...

Thank you.

Commenting to subscribe. (this should be a feature, following rants)

In git we have hooks that can handle that. They can trigger on specific branch pushes, so you merge locally and push, the hook takes care of updating production

At work, we achieve that with our Gitlab server, it is really easy to set up with just a single yml file.
I personally don't have experience with SVN but heard that it is kind of outdated or less usable than Git, but I don't want to start a war here 😉