-`about/index.md` shows how to add a content page.
-`posts/` has the blog posts but really they can live in any directory. They need only the `post` tag to be added to this collection.
- Add the `nav` tag to add a template to the top level site navigation. For example, this is in use on `index.njk` and `about/index.md`.
- Content can be any template format (blog posts needn’t be markdown, for example). Configure your supported templates in `.eleventy.js` -> `templateFormats`.
- The `css` and `png` directories in the input directory are going to be copied without modification to the output, because they're passed to `addPassthroughCopy()`.
- The blog post feed template is in `feed/feed.njk`. This is also a good example of using a global data files in that it uses `_data/metadata.json`.
- This example uses three layouts:
-`_includes/layouts/base.njk`: the top level HTML structure
-`_includes/layouts/home.njk`: the home page template (wrapped into `base.njk`)
-`_includes/layouts/post.njk`: the blog post template (wrapped into `base.njk`)
-`_includes/postlist.njk` is a Nunjucks include and is a reusable component used to display a list of all the posts. `index.njk` has an example of how to use it.