Kaleb Heitzman

If you're after Markdown I would look at https://www.netlifycms.org. I've used it on several projects to allow clients to use Markdown to publish and it integrates really well with Gatsby. You can create your own content structures using it then implement them into your templates. These are all the widgets you can use: https://www.netlifycms.org/docs/widgets/

This keeps it strictly static file driven with no database or need for express etc.