docs: update README.md

README.md

@@ -18,6 +18,23 @@ Hey, nice to meet you, you found this Jekyll theme. Here the yet another theme i
 
 </p>
 
+## Features
+
+- Full layouts `home`, `post`, `tags`, `archive` and `about`.
+- Uses font awesome 5 for icons.
+- Beautiful Syntax Highlight using [hilight.js][hilight-js].
+- RSS support using [Jekyll Feed][jekyll-feed] gem.
+- Optimized for search engines using [Jekyll Seo Tag][jekyll-seo-tag] gem.
+- Sitemap support using [Jekyll Sitemap][jekyll-sitemap] gem.
+- Complex and flexible table support using [Jekyll Spaceship][jekyll-spaceship] gem.
+- MathJAX and LaTeX optional support using [Jekyll Spaceship][jekyll-spaceship] gem.
+- Media (Youtube, Spotify, etc.) support using [Jekyll Spaceship][jekyll-spaceship] gem.
+- Diagram (PlantUML, Mermaid) support using [Jekyll Spaceship][jekyll-spaceship] gem.
+- Google Translation support.
+- New post tag support.
+
+Also, visit the live [demo][yat-live-demo] site for the theme.
+
 ## Installation
 
 Add this line to your Jekyll site's `Gemfile`:
@@ -67,3 +84,13 @@ You can start by [opening an issue](https://github.com/jeffreytse/jekyll-theme-y
 ## License
 
 This theme is licensed under the [MIT license](https://opensource.org/licenses/mit-license.php) © JeffreyTse.
+
+<!-- External links -->
+[jekyll]: https://jekyllrb.com/
+[yat-git-repo]: https://github.com/jeffreytse/jekyll-theme-yat/
+[yat-live-demo]: https://jeffreytse.github.io/jekyll-theme-yat/
+[jekyll-spaceship]: https://github.com/jeffreytse/jekyll-spaceship
+[jekyll-seo-tag]: https://github.com/jekyll/jekyll-seo-tag
+[jekyll-sitemap]: https://github.com/jekyll/jekyll-sitemap
+[jekyll-feed]: https://github.com/jekyll/jekyll-feed
+[hilight-js]: https://github.com/highlightjs/highlight.js