Document supported theme settings in the readme

README.md

@@ -8,3 +8,22 @@ You can see a live demo [here](http://jvanz.github.io/)
 ![Screenshot](screenshot.png)
 
 Pull requests are welcome
+
+
+## Settings
+
+List of Pelican's settings that are supported by this theme. Refer to the
+[Pelican's documentation](https://docs.getpelican.com/en/stable/settings.html)
+for more details.
+
+- `FEED_*` and `*_FEED_*`
+- `DISQUS_SITENAME`
+- `GOOGLE_ANALYTICS`
+- `GA_COOKIE_DOMAIN`
+- `SITESUBTITLE`
+
+Additional settings:
+
+- `BIO` - short biography to display in the sidebar, eg. `Hello world`
+- `PROFILE_IMAGE` - image to display in the sidebar, eg. `avatar.png`
+- `FONT_AWESOME` - Fontawesome kit, eg `https://kit.fontawesome.com/{{ FONT_AWESOME }}.js`