DietPi

DietPi is a  highly optimised & minimal Debian-based Linux distribution . DietPi is extremely lightweight at its core, and also extremely easy to install and use. 
 Setting up a single board computer (SBC) or even a computer, for both regular or server use, takes time and skill. DietPi provides an  easy way to install and run favourite software you choose . 
 
 https://dietpi.com/   
 What Is DietPi, and Should You Install It on Your Raspberry Pi?