fixes

roles/bareos/molecule/default/Dockerfile_alpine

@@ -11,7 +11,7 @@ RUN bash -c 'echo "rc_provide=\"loopback net\"" >> /etc/rc.conf'
 RUN sed -i -e 's/#rc_sys=""/rc_sys="lxc"/g' -e 's/^#\(rc_logger="YES"\)$/\1/' /etc/rc.conf
 RUN sed -i "/tty/d" /etc/inittab
 RUN sed -i "s/hostname $opts/# hostname $opts/g" /etc/init.d/hostname
-RUN sed -i "s/mount -t tmpfs/# mount -t tmpfs/g" /lib/rc/sh/init.sh
+RUN bash -c 'sed -i "s/mount -t tmpfs/# mount -t tmpfs/g" /lib/rc/sh/init.sh'
 
 VOLUME ["/sys/fs/cgroup"]
 ENTRYPOINT ["/sbin/init"]