Add Cloud Code guide to README (parse-community#5936)

Make the guide easily accessible

README.md

@@ -41,7 +41,7 @@
 
 Parse Server works with the Express web application framework. It can be added to existing web applications, or run by itself.
 
-The full documentation for Parse Server is available in the [wiki](https://github.com/parse-community/parse-server/wiki). The [Parse Server guide](http://docs.parseplatform.org/parse-server/guide/) is a good place to get started. An [API reference](http://parseplatform.org/parse-server/api/) is also available. If you're interested in developing for Parse Server, the [Development guide](http://docs.parseplatform.org/parse-server/guide/#development-guide) will help you get set up.
+The full documentation for Parse Server is available in the [wiki](https://github.com/parse-community/parse-server/wiki). The [Parse Server guide](http://docs.parseplatform.org/parse-server/guide/) is a good place to get started. An [API reference](http://parseplatform.org/parse-server/api/) and [Cloud Code guide](https://docs.parseplatform.org/cloudcode/guide/) are also available. If you're interested in developing for Parse Server, the [Development guide](http://docs.parseplatform.org/parse-server/guide/#development-guide) will help you get set up.
 
 - [Getting Started](#getting-started)
     - [Running Parse Server](#running-parse-server)