Update on CLI

sudo -u www-data php updater/updater.phar --no-interaction

Edit config.php

sudo docker run -it --rm --volume nextcloud_aio_nextcloud:/var/www/html:rw alpine sh -c "apk add --no-cache vim && vim /var/www/html/config/config.php"

OCC

sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ