The theme jekyll-book is used here.

I have set this up to se with obsidian. It uses the templater community plugin, and the templates are located inside _templates.

Posts are within the folder _posts. Use the folder structure based on the category of the post. The mandatory index file 0000-01-01-index.md inside the category folder within posts.

_posts/:category/0000-01-01-index.md

With contents:

---
title: index
date: 0000-01-01
category: code
layout: category-index
---

To build the blog and serve it locally, run bundle exec jekyll serve.