Media example of Algolia documentation

Dear Algolia team,
I am interesting in using Algolia for search within documents,
very similar to your “Media” example in the documentation:

I would be interested how you have structured your data (i.e. the article texts and meta data) and how you have set up the associated index for the search.
Unfortunately, there is no link to view the dataset.
Is there more information available how to create the “back-end” for that use case?
(I found and tested the front-end repo.)
Or is there a tutorial for such a use case where search is performed in articles which contain much more text than product descriptions.
Thank you,
martin