Installing-using-Docker-(recommended!).md

@@ -10,6 +10,8 @@ For a one-shot install, paste this into the terminal of a running debian-like Li
 
 `sudo curl https://raw.githubusercontent.com/hacknix/FreeDMR/master/docker-configs/docker-compose_install.sh | bash`
 
+This works on Debian 10 and recent Ubuntu systems, on other flavours, you may need to follow the process below.
+
 The rest of this page details the manual install process. 
 
 ## Prerequisites