docs: Readme full feature install guide (#4168)

README.md

@@ -1,6 +1,8 @@
 # A real-time collaborative editor for the web
 <a href="https://hub.docker.com/r/etherpad/etherpad"><img alt="Docker Pulls" src="https://img.shields.io/docker/pulls/etherpad/etherpad"></a>
+
 [![Travis (.org)](https://api.travis-ci.org/ether/etherpad-lite.svg?branch=develop)](https://travis-ci.org/github/ether/etherpad-lite)
+
 ![Demo Etherpad Animated Jif](doc/images/etherpad_demo.gif "Etherpad in action")
 
 # About
@@ -92,6 +94,13 @@ If you prefer, `ep_hash_auth` also gives you the option of storing the users in
 
 Etherpad is very customizable through plugins. Instructions for installing themes and plugins can be found in [the plugin wiki article](https://github.com/ether/etherpad-lite/wiki/Available-Plugins).
 
+## Getting the full features
+Run the following command in your Etherpad folder to get all of the features visible in the demo gif:
+
+```
+npm install ep_headings2 ep_markdown ep_comments_page ep_align ep_page_view ep_font_color ep_webrtc ep_embedded_hyperlinks2
+```
+
 ## Customize the style with skin variants
 
 Open <http://127.0.0.1:9001/p/test#skinvariantsbuilder> in your browser and start playing !