Installing Docker on Arch Linux

This shall be simply:
[root@archt20 ~]# pacman -S docker
resolving dependencies...
looking for conflicting packages...

 Packages (4) bridge-utils-1.5-2  containerd-0.2.2-1  runc-0.1.1-2  docker-1:1.11.2-2

 Total Download Size:   11.99 MiB
Total Installed Size:  60.29 MiB

 :: Proceed with installation? [Y/n]
...
Optional dependencies for docker
    btrfs-progs: btrfs backend support [installed]
    lxc: lxc backend support
:: Running post-transaction hooks...

Note that Docker service is managed by systemd and following file is service entry point: /lib/systemd/systemdocker.service. Also it seems that /var/lib/docker is not created by the installer, what would make easy "factory reset" easy, just by rm -rf /var/lib/docker:
[root@archt20 system]# ls -a /var/lib/
.  ..  arpd  dbus  dhcpcd  ex  ip6tables  iptables  krb5kdc  logrotate.status  machines  misc  pacman  systemd

The final steps - for instalation -  is simply to enable docker: systemctl enable docker

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