in my ubuntu server I run a docker container using this command:
sudo docker run -it --name next-cloud-01 -d -p 8080:80 -v "/media/usr/dati:/var/www/html/data/usr/files" nextcloud
/media/usr/dati is a mount point for my sdb1 HD, and /var/www/html/data/usr/files is where Next Cloud saves the user data. I specified this volume because I want that Next Cloud manages all the data using my sdb1 HD.
unfortunately when I try to configure Next Cloud, something wrong happens, and from the login web page, I can't do anything (see the attached screenshot).
if I don't use the -v option this error doesn't exist, so I think that, maybe, the issue is something like permissions, .. it seems that Next Cloud is not able to write on sdb1 HD, but I don't know why. how can I solve thi issue?