In the documentation on Cloudron for Kutt it shows a screenshot for custom domains, inside of this screenshot it shows the IP to use for A record is 18.104.22.168.
This is the VPS IP address. You can ignore this instruction though. Cloudron will add the A records for you. You have to add the custom domains as aliases the in the Location view of the app in the Cloudron dashboard.
Regarding the actual issue, I am not sure the config file allows to change things like fonts. The settings are about other google services, which may or may not be used.
To get rid of all google links in the UI and static assets, I think you have to raise that issue in the upstream project to have it supported.
Nov 10 13:05:05 15:M 10 Nov 21:05:05.039 * Running mode=standalone, port=6379.
Nov 10 13:05:05 15:M 10 Nov 21:05:05.039 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
Nov 10 13:05:05 15:M 10 Nov 21:05:05.039 # Server initialized
Nov 10 13:05:05 15:M 10 Nov 21:05:05.039 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
Nov 10 13:05:05 15:M 10 Nov 21:05:05.039 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.