Improve readme

- Add more links to the docs
- Add screenshots

README.md

@@ -18,8 +18,6 @@ It's simple, fast, lightweight and super easy to install.
 
 Official website: <https://miniflux.app>
 
-Miniflux 2 is a rewrite of [Miniflux 1.x](https://github.com/miniflux/miniflux-legacy) in Golang.
-
 Documentation
 -------------
 
@@ -30,11 +28,32 @@ The Miniflux documentation is available here: <https://docs.miniflux.app/>
 - [Requirements](https://docs.miniflux.app/en/latest/requirements.html)
 - [Installation Instructions](https://docs.miniflux.app/en/latest/installation.html)
 - [Installation Tutorials](https://docs.miniflux.app/en/latest/tutorials.html)
-- [Upgrading to a new version](https://docs.miniflux.app/en/latest/upgrade.html)
+- [Upgrading to a New Version](https://docs.miniflux.app/en/latest/upgrade.html)
 - [Configuration](https://docs.miniflux.app/en/latest/configuration.html)
+- [Command Line Usage](https://docs.miniflux.app/en/latest/cli.html)
+- [User Interface Usage](https://docs.miniflux.app/en/latest/usage.html)
+- [Keyboard Shortcuts](https://docs.miniflux.app/en/latest/keyboard_shortcuts.html)
+- [Integration with External Services](https://docs.miniflux.app/en/latest/integration.html)
+- [Scraper Rules](https://docs.miniflux.app/en/latest/scraper_rules.html)
+- [Rewrite Rules](https://docs.miniflux.app/en/latest/rewrite_rules.html)
+- [REST API](https://docs.miniflux.app/en/latest/api.html)
+- [Development](https://docs.miniflux.app/en/latest/development.html)
+- [Internationalization](https://docs.miniflux.app/en/latest/i18n.html)
+- [Frequently Asked Questions](https://docs.miniflux.app/en/latest/faq.html)
+
+Screenshots
+-----------
+
+Default theme:
+
+![Default theme](https://miniflux.app/image/overview.png)
+
+Dark theme when using keyboard naviguation:
+
+![Dark theme](https://miniflux.app/image/item-selection-black-theme.png)
 
 Credits
 -------
 
-- Author: Frédéric Guillot
+- Authors: Frédéric Guillot - [List of contributors](https://github.com/miniflux/miniflux/graphs/contributors)
 - Distributed under Apache 2.0 License