Sorting the sidebar

Default sorted by path, If you want to further setting, add following configuration to your _config.yml

readme_index:
  with_frontmatter: true

Then add following Front Matter to markdown files.

---
sort: 1 # follow a certain sequence of letters or numbers
---

Now the sorted files will have certain order from your input!

If you want to turn off the order prefix in toctree, show_sorted: false