docker container unable to create directory in volume

Question

I installed docker on a Raspberry Pi. I created the docker group and added my current user (pi) in the new group so I don't have to sudomy docker commands

A volume I want to use is created docker volume create appdemaon_config Created in /var/lib/docker/volumes/appdaemon_config/_data (root:root perms created by default)

Then when I start the container like so

docker run --rm --name=appdaemon -v appdaemon_config:/conf -p 5050:5050\ 
 -e HA_URL="http://192.168.1.105:8123"\
 -e ASH_URL="http://$HOSTNAME:5050" 76d1dca80fdaD`

(I also tried docker run with sudo, same result)

The script executed in the container is supposed to create 2 directories in the conf dir (which is the mounted volume) but it throws a permission error.

I'm not even allowed to lsthe volume with my pi user, I have to sudo.

What am I missing about the perms or perms execution of a docker container ?