Updated documentation.

Author: madworx

README.md

@@ -8,6 +8,7 @@ Currently, the following images are [available and automatically built on Docker
   * Debian 5 Lenny   (~2009 (Link to [debian.org](https://www.debian.org/releases/lenny/)))
   * Debian 6 Squeeze (~2011 (Link to [debian.org](https://www.debian.org/releases/squeeze/)))
   * Debian 7 Wheezy  (~2016 (Link to [debian.org](https://www.debian.org/releases/wheezy/)))
+  * Debian 8 Jessie  (~2015 (Link to [debian.org](https://www.debian.org/releases/jessie/)))
 
 Later releases are readily available for the [official Debian repo at Docker Hub](https://hub.docker.com/_/debian/).