Q: Gatsby Starter Blog create page with form Is it possible to make a form or something similar so that people can create a post (with the extension .mdk) "dynamically" and not that the programmer has to do it from the code?

A: You could try using a CMS (Content management system) that addresses these very issues so that marketers and writers can create posts and blogs and developers can develop the look and feel of the pages. 
A view to try out that have free versions that I have used are
Contentful
ButterCMS
and a plethora of others. 
