docker-min: add a new kickstart for creating a slimmer image

We'll start with the same used for fedora docker base.

fedora-docker-base-minimal.ks

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+# This is a minimal Fedora install designed to serve as a Docker base image.
+#
+# To keep this image minimal it only installs English language. You need to change
+# yum configuration in order to enable other languages.
+#
+###  Hacking on this image ###
+# This kickstart is processed using Anaconda-in-ImageFactory (via Koji typically),
+# but you can run imagefactory locally too.
+#
+# To do so, testing local changes, first you'll need a TDL file.  I store one here:
+# https://git.fedorahosted.org/cgit/fedora-atomic.git/tree/fedora-atomic-rawhide.tdl
+#
+# Then, once you have imagefactory and imagefactory-plugins installed, run:
+#
+#   imagefactory --debug target_image --template /path/to/fedora-atomic-rawhide.tdl --parameter offline_icicle true --file-parameter install_script $(pwd)/fedora-docker-base.ks docker
+#
+
+text # don't use cmdline -- https://github.com/rhinstaller/anaconda/issues/931
+bootloader --disabled
+timezone --isUtc --nontp Etc/UTC
+rootpw --lock --iscrypted locked
+
+keyboard us
+zerombr
+clearpart --all
+part / --fstype ext4 --grow
+network --bootproto=dhcp --device=link --activate --onboot=on
+reboot
+
+%packages --excludedocs --instLangs=en --nocore
+bash
+tar # https://bugzilla.redhat.com/show_bug.cgi?id=1409920
+fedora-release
+rootfiles
+vim-minimal
+dnf
+dnf-yum  # https://fedorahosted.org/fesco/ticket/1312#comment:29
+sssd-client
+#fakesystemd #TODO: waiting for review https://bugzilla.redhat.com/show_bug.cgi?id=1118740
+-kernel
+
+
+%end
+
+%post --erroronfail --log=/root/anaconda-post.log
+set -eux
+
+# Set install langs macro so that new rpms that get installed will
+# only install langs that we limit it to.
+LANG="en_US"
+echo "%_install_langs $LANG" > /etc/rpm/macros.image-language-conf
+
+# https://bugzilla.redhat.com/show_bug.cgi?id=1400682
+echo "Import RPM GPG key"
+releasever=$(rpm -q --qf '%{version}\n' fedora-release)
+basearch=$(uname -i)
+rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-$basearch
+
+echo "# fstab intentionally empty for containers" > /etc/fstab
+
+# remove some extraneous files
+rm -rf /var/cache/dnf/*
+rm -rf /tmp/*
+
+#Mask mount units and getty service so that we don't get login prompt
+systemctl mask systemd-remount-fs.service dev-hugepages.mount sys-fs-fuse-connections.mount systemd-logind.service getty.target console-getty.service
+
+# https://bugzilla.redhat.com/show_bug.cgi?id=1343138
+# Fix /run/lock breakage since it's not tmpfs in docker
+# This unmounts /run (tmpfs) and then recreates the files
+# in the /run directory on the root filesystem of the container
+umount /run
+systemd-tmpfiles --create --boot
+
+# Remove machine-id on pre generated images
+rm -f /etc/machine-id
+touch /etc/machine-id
+
+%end