hostname fix
hostname fix

Under recent CoreOS `hostanme -s` fails if /etc/hostname container domainless host name. So drop the -s switch and cut the domain part if any with Bash.

ibukanov/hippyru-dock,ibukanov/hippyru-dock,ibukanov/hippyru-dock,ibukanov/hippyru-dock,ibukanov/hippyru-dock,ibukanov/hippyru-dock