Add installation instructions

README.md

@@ -12,3 +12,16 @@ The library has been tested on the *Raspberry Pi 4 Model B*. Other hardware devi
 
 Other hardware then the *Raspberry Pi 4* may be supported. But testing the framebuffer access on x86_64 computers and Qemu were not successful.
 
+## Installation
+
+Download the sources from [GitHub](https://github.com/RossAdrian/pyframebuffer) and run the following commands:
+
+```sh
+sudo ./setup.py install
+```
+
+Ensure you have installed the python development package (named `python-dev` or `python-devel`) of your Linux distribution
+to be able to build and install this package. Recommended is the installation on a headless distribution with framebuffer
+console like *Raspberry Pi OS lite* or *Ubuntu Server* to see the graphics output on the screen. Full screen display without
+noisy framebuffer console output is best with running a python script with the draw operations and sleep the amount of seconds
+required to see the magic of the graphics output.

setup.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from setuptools import setup, Extension
 import platform