Edit Hugo content files directly in root folder

I am new to netlify and netlifyCMS. Did upload a Hugo site which is working well. Now trying to implement CMS. It is a very simple site with only a few *.md content files located directly in the root of the /content folder. How do I need to configure the config.yml so that I can edit them?

Thank you Best regards

How many English words
do you know?
Test your English vocabulary size, and measure
how many words do you know
Online Test
Powered by Examplum