add a more complete dnsmasq guide

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

readme.md

@@ -166,6 +166,7 @@ No and it will not be added. Please use a dedicated domain for Nextcloud and set
 ### How can I access Nextcloud locally?
 The recommended way is to set up a local dns-server like a pi-hole and set up a custom dns-record for that domain that points to the internal ip-adddress of your server that runs Nextcloud AIO. Below are some guides:
 - https://www.howtogeek.com/devops/how-to-run-your-own-dns-server-on-your-local-network/
+- https://help.nextcloud.com/t/need-help-to-configure-internal-access/156075/6
 - https://howchoo.com/pi/pi-hole-setup together with https://docs.callitkarma.me/posts/PiHole-Local-DNS/
 - https://dockerlabs.collabnix.com/intermediate/networking/Configuring_DNS.html