Add a docker common kickstart as a central bit for shared config.

There's a lot of similarities between base and base-minimal so
introduce a docker-common.ks to ensure as much as possible is shared
between the two ensure as much shared as possible.

Signed-off-by: Peter Robinson <pbrobinson@fedoraproject.org>

fedora-docker-common.ks

@@ -0,0 +1,60 @@
+# This is the common bits between Fedora Docker base image.
+#
+# To keep this image minimal it only installs English language. You need to change
+# dnf 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:
+#
+#   ksflatten -c fedora-docker-base[-minimal].ks -o fedora-docker-base-test.ks
+#   imagefactory --debug target_image --template /path/to/fedora-atomic-rawhide.tdl --parameter offline_icicle true --file-parameter install_script $(pwd)/fedora-docker-base-test.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
+network --bootproto=dhcp --device=link --activate --onboot=on
+reboot
+
+# boot partitions are irrelevant as none of that content is taken into the final docker image
+# We will be able to move to autopart when new pykickstart lands which adds option for noswap/noboot (fixed upstream)
+zerombr
+clearpart --all
+part /boot/efi --fstype="vfat" --size=100
+part / --fstype ext4 --grow
+
+%packages --excludedocs --instLangs=en --nocore
+fedora-release
+bash
+-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)
+rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-primary
+
+echo "# fstab intentionally empty for containers" > /etc/fstab
+
+# Remove machine-id on pre generated images
+rm -f /etc/machine-id
+touch /etc/machine-id
+
+%end