Hi Friends,
I’m trying to install on my production VPS (Debian Jessie http and email server) “Collabora Office” for NextCloud, and for this I need Docker.
So following the collaboraonline tutoral, I tried to install Docker first.
But to my great surprise it requires these packages:
aufs-tools cgroupfs-mount docker-ce libnih-dbus1 libnih1 makedev mountall pigz plymouth
and some of them (plymouth for example) worry me, I would not compromise the server boot with delicate services.
Can I stay pacific or in fact there are some risk? 
Many thanks! 