How to understand the demo data from the regular slim-skeleton (slim framework)?

Question

Slim Framework

I want to study the Slim microframework, set myself Slim-Skeleton , and would like to figure out what and why it was done there (in the demo data).

Please tell me where I can read about it, or who can explain what demo files
- why they were created, why they are in these folders?

Answer 1

Please tell me where I can read about it

You will not believe.