Mount /etc/group from the host to the container also on the Mac

run/scripts/start

@@ -49,12 +49,12 @@ function startContainer {
         --volume ${WORKDIR}:/drupal
         --volume ${SSHAUTH}:${SSHAUTHSOCK}
         --volume ${HOMEDIR}:/home/${USERNAME}
+        --volume /etc/group:/etc/group:ro
         --workdir /drupal
         --restart unless-stopped
       )
       if [[ ${L3DHOSTOS} != Darwin ]]; then
         start_params+=(
-          --volume /etc/group:/etc/group:ro
           --volume /etc/passwd:/etc/passwd:ro
           --volume /etc/shadow:/etc/shadow:ro
           --volume /etc/sudoers:/etc/sudoers:ro