I recently started with linuxserver.io and docker. At first I used Bind Mounts, but then I wanted to give Named Volumes a try.
Using Named Volumes takes some extra steps, like having to add something like this for volumes to docker-compose.yml.
volumes:
heimdall:
swag:
To access and edit config in volume this can be useful:
sudo docker exec -it (contain_id) /bin/bash