Persist /root on data volume at /mnt/data/root

Conceptually /root is just /home/root, and we already persist /home,
so wiping /root on each reboot doesn't make sense, as it can store
config data from rootful nerdctl etc (and the shell history of the
root user).

Signed-off-by: Jan Dubois <[email protected]>

Author: jandubois

pkg/cidata/cidata.TEMPLATE.d/boot/05-persistent-data-volume.sh

@@ -7,7 +7,7 @@ set -eux -o pipefail
 test -f /etc/alpine-release || exit 0
 
 # Data directories that should be persisted across reboots
-DATADIRS="/etc /home /tmp /usr/local /var/lib"
+DATADIRS="/etc /home /root /tmp /usr/local /var/lib"
 
 # When running from RAM try to move persistent data to data-volume
 # FIXME: the test for tmpfs mounts is probably Alpine-specific