add inspired by

Signed-off-by: Simon L <szaimen@e.mail.de>

docker-compose.yml

@@ -49,6 +49,7 @@ services:
   #   network_mode: "host"
 
 # # Optional: If you need ipv6, follow step 1 and 2 of https://github.com/nextcloud/all-in-one/blob/main/docker-ipv6-support.md first and then uncomment the below config in order to activate ipv6 for the internal nextcloud-aio network
+# # Inspired by https://github.com/mailcow/mailcow-dockerized/blob/master/docker-compose.yml
 # networks:
 #   nextcloud-aio:
 #     driver: bridge