Add :ro,Z to coresmd-coredns.container Corefile volume spec (#40)

Signed-off-by: Eric Lund <77127214+erl-hpe@users.noreply.github.com>

Author: erl-hpe

systemd/containers/coresmd-coredns.container

@@ -18,7 +18,7 @@ AddCapability=NET_RAW
 
 # Volumes
 Volume=/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem:/root_ca/root_ca.crt:ro,Z
-Volume=/etc/openchami/configs/Corefile:/Corefile
+Volume=/etc/openchami/configs/Corefile:/Corefile:ro,Z
 
 # Networks for the Container to use
 Network=host