add info about the Nextcloud VM

It's production ready now.

README.md

@@ -45,6 +45,11 @@ changed it substantially:
 
 More information how to contribute: https://nextcloud.com/contribute/
 
+## Nextcloud VM
+If you're not familiar with Linux, or simply just want to get up and running on a pre-configured system in no time - we have developed a VM that you just download. Just extract it and mount it in VMware or VirtualBox and your're all set.
+
+You can download the latest version [here](https://github.com/nextcloud/vm/releases/)
+
 ## Support
 Learn about the different ways you can get support for Nextcloud: https://nextcloud.com/support/