Create README.md

README.md

@@ -21,3 +21,9 @@ Type <code>sudo ./install.sh</code>
 ## ATTENTION
 
 CraftBeerPi 3.0 is a complete rewrite. Server as well as user interface. I recommend to use a second SD card for testing.
+
+## Donation
+
+CraftBeerPi is a free & open source project. If you like to support the project I happy about a donation:
+
+[![Donate](https://www.paypal.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2X9KR98KJ8YZQ)