README.md in berkshelf-api-2.1.3 vs README.md in berkshelf-api-2.2.0

@@ -6,9 +6,15 @@
 
 ## Installation
 
 The API server can be installed in two ways; from a Chef Cookbook (recommended) and from a Rubygem.
 
+## Supports
+
+Chef >= 12.2
+Ubuntu 12.04/16.04
+RHEL/CentOS 6.x/7.x
+
 ### Cookbook install
 
 #### Basic
 
 1. Select a [release](https://github.com/berkshelf/berkshelf-api/releases) and download its cookbooks artifact (`cookbooks.tar.gz`).