serial1: Add config for serial console machine

serial-console.yaml

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+variant: fcos
+version: 1.4.0
+ignition:
+  config:
+    merge:
+    - local: packages.ign
+
+storage:
+  files:
+  - path: /etc/ignition/packages.d/serial-console
+    mode: 0644
+    contents:
+      inline: |
+        picocom
+        tmux

serial1.yaml

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+variant: fcos
+version: 1.4.0
+
+ignition:
+  config:
+    merge:
+    - local: fix-hybrid-mbr.ign
+    - local: common.ign
+    - local: zram.ign
+    - local: cfg.ign
+    - local: serial-console.ign
+
+passwd:
+  users:
+  - name: root
+    password_hash: '$6$rounds=656000$Dwv1aYtPgIZ3qgrW$3NULGiOIBcNUwNJsk0WjaIZx2uDCapejz7A/DwYGiZWVXvm5KLjW5lAh0zhzAfF6M.rXxi/YBygaNaN2XAAj5/'
+
+# Attempting to add a user to any group other than adm, wheel, sudo, or
+# systemd-journal causes Ignition to fail:
+#
+#     useradd: group 'dialout' does not exist
+#
+# Work-around:
+#
+#     sed -n '/^dialout:/s/.*/\0core/p' /lib/group | sudo tee -a /etc/group
+#
+# See also: https://discussion.fedoraproject.org/t/groupadd-usermod-dont-always-work-in-coreos/41735
+# See also: https://github.com/coreos/rpm-ostree/issues/49
+#
+#  - name: core
+#    groups:
+#    - adm
+#    - wheel
+#    - sudo
+#    - dialout
+#    - systemd-journal
+
+storage:
+  files:
+  - path: /etc/hostname
+    mode: 0644
+    contents:
+      inline: serial1.pyrocufflink.blue
+
+  - path: /etc/NetworkManager/system-connections/enu1u1.nmconnection
+    mode: 0600
+    contents:
+      inline: |
+        [connection]
+        id=enu1u1
+        type=ethernet
+        interface-name=enu1u1
+
+        [ipv4]
+        address1=172.30.0.13/26,172.30.0.1
+        dns=172.30.0.1;
+        dns-search=pyrocufflink.blue;
+        method=manual
+        may-fail=false