diff --git a/Settings.md b/Settings.md
index 436232a..b241d89 100644
--- a/Settings.md
+++ b/Settings.md
@@ -5,6 +5,10 @@
 * [Apache](Apache)
 * [Caddy](Caddy-Webserver-Config)
 
+NOTE:
+- Docker/Source/Bundle like this, no quotes, big letters, underscore: `ROOT_URL=http://192.168.0.100`
+- Snap like this, single quotes, small letters: `root-url='http://192.168.0.100'`
+
 Examples:
 
 1) nginx SSL or without SSL, available at internet: