How do I use toc (without html)?

[CaseyHofland]

I build small packages for Unity and want to use github pages to create documentation quickly and easily. What's missing is a table of contents and this seems like a good solution, but for someone who has done half a year of React and still barely understands html, step 3 of the Usage in the Readme makes no sense to me. May I ask if someone would be so kind to elaborate on this point for me? Assume I am 5 years of age.

Since I'd like to keep my html writing to a minimum (remember, I want to write quickly and easily, nothing fancy) I was hoping for an answer that allows me to, other than some config.html, write all my documentation in .md files.

[CaseyHofland]

I feel like an idiot... so yeah, github Wiki is exactly what I want and it's even easier to use. Now that I learned about it I'm surprised that I have never once heard about this, and I've been developing for 5 years now. How embarrassing.

Anyho, cheerio! I'll keep the question up so someone can score gratification points if they wish.