Location of nextcloud.cfg in Docker AIO

I have a stupid user question, as I’m not familiar with docker.

I’m getting the following message:

please add “default_phone_region” with the respective [ISO 3166-1 code :arrow_upper_right:]
on my AIO status page. I know what to do.

(Configuration Parameters — Nextcloud latest Administration Manual latest documentation)

I just don’t know where to do it. Where is the nextcloud.cfg file in docker AIO?

Nextcloud version AIO v2.1.1
Operating system and version Ubuntu 20.04)

Thanks in advance.

Hi, see GitHub - nextcloud/all-in-one: Nextcloud AIO stands for Nextcloud All In One and provides easy deployment and maintenance with most features included in this one Nextcloud instance.