What is the best way to implement Blog on a SaaS app?

I have a single-page app, with only a couple of support pages.

I want to start adding content to it to in forms of blog posts OR instructions.

It should be searchable by engines, and the pages should serve as instructions for each of the features for the app.

The goal is to improve the SEO side.

Can anyone recommend a well proven implementation for something like this?