Greetings,

I have just installed piwigo in docker. I had specified a volume (not a bind mount) piwigo_data:/config and when I loaded a few photos, I could see them in /var/lib/docker/volumes/piwigo_data/_data/gallery/upload/2020/10/02.
However docker also created another volume. I found it had nothing in it. What is it for?

Piwigo version: 2.10.2
PHP version: 7.3.22
MySQL version: 5.5..5-10.1.44
Piwigo URL: http://