change docker FTLCONF_dns_listeningMode to ALL

Signed-off-by: cornshakes <michael.hopfner@icloud.com>

Author: cornshakes

docs/docker/index.md

@@ -26,8 +26,8 @@ services:
       TZ: 'Europe/London'
       # Set a password to access the web interface. Not setting one will result in a random password being assigned
       FTLCONF_webserver_api_password: 'correct horse battery staple'
-      # If using Docker's default `bridge` network setting the dns listening mode should be set to 'all'
-      FTLCONF_dns_listeningMode: 'all'
+      # If using Docker's default `bridge` network setting the dns listening mode should be set to 'ALL'
+      FTLCONF_dns_listeningMode: 'ALL'
     # Volumes store your data between container upgrades
     volumes:
       # For persisting Pi-hole's databases and common configuration file