make custom caddy config changeable in nextcloud

[derStephan]

Hi,

in #8 you added the possibility to add a custom config by adding files in the container volume to /data/caddy-imports/.

Maintaining that files could be easier if they were placed at the admin files like the geo-filter-configs: /nextcloud/admin/files/nextcloud-aio-caddy/caddy-imports

If you changed that, everything regarding caddy is in one place. If you agree, I am happy to send a PR.

Regards
Stephan

[szaimen]

Yes, I like the idea 👍

Thanks for bringing this up!

[szaimen]

@derStephan are you able to look into this? :)