Add OHF logo to README (#3603)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

README.md

@@ -4,6 +4,8 @@ Home Assistant Operating System (formerly HassOS) is a Linux based operating sys
 
 Home Assistant Operating System uses Docker as its container engine. By default it deploys the Home Assistant Supervisor as a container. Home Assistant Supervisor in turn uses the Docker container engine to control Home Assistant Core and Add-Ons in separate containers. Home Assistant Operating System is **not** based on a regular Linux distribution like Ubuntu. It is built using [Buildroot](https://buildroot.org/) and it is optimized to run Home Assistant. It targets single board compute (SBC) devices like the Raspberry Pi or ODROID but also supports x86-64 systems with UEFI.
 
+[![Home Assistant - A project from the Open Home Foundation](https://www.openhomefoundation.org/badges/home-assistant.png)](https://www.openhomefoundation.org/)
+
 ## Features
 
 - Lightweight and memory-efficient