Single "About" page content template

I have an `_index.md` page under `content/about/` with this front matter and content.

```
+++
title = "About me"
template = "section.html"
+++

Your about page content here.
```

On http://127.0.0.1:1111/about, I can see `About me`, but not the text `Your about page content here.`

What am I missing?