Guide to install multiple instances of OctoPrint on a Raspberry Pi

I have updated my Installation Guide for OctoPrint 1.4.0 under Python 3. This is the setup I use to test different versions of OctoPrint (stable, dev, my own, …)

It is rather complete, and includes the installation of Raspbian itself, multiple python virtual environments using pyenv virtualenv , using Supervisor to manage OctoPrint instances, NGINX as a reverse proxy and also as a front end to display a page with all the instances.

Screenshot

The guide is available here:
http://sebastien.andrivet.com/en/posts/installing-multiple-octoprints-raspberry-pi/