How to add another target?

Hi,
I would like to create a system image for my nanopi2 board [1]. So, I am exploring in the direction of armbian [2], which is a setup environment aimed to build a debian system for various arm boards. Some prebuilds systems are already available, and my project is to add my own system image.

Any comment appreciated.

samy

[1] http://wiki.friendlyarm.com/wiki/index.php/NanoPi_2
[2] http://www.armbian.com/