Add Ubuntu Server initial draft

packer/preseed/UbuntuServer20.04/user-data

@@ -0,0 +1,29 @@
+#cloud-config
+autoinstall:
+  version: 1
+  locale: en_US
+  keyboard:
+    layout: en
+    variant: us
+  network:
+    network:
+      version: 2
+      ethernets:
+        ens192:
+          dhcp4: true
+  storage:
+    layout:
+      name: lvm
+  identity:
+    hostname: packer-template
+    username: root
+    password: <<ssh-password>>
+  ssh:
+    install-server: yes
+    allow-pw: true
+#    authorized-keys: 
+#      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCi9eAu6KBaShdcL4pxi6/sJp+IS6nCKexcjQdwFLxg+EoiT2MTAnMsjnfi570het+VV+iOigcZLuRwEcAPh6rSQOtpikmpV6WFjzToWq9aUxDrxWsp/iEPHp+sbjrlsdnGvLGY9XhmPs9s5I8xFQbwF6ilhMIQm+RxtGJJuPUWaF+uXo+3CB91A6bK/rjs97iAjrPZRs0vo5hJGqrIGFi3WP9hf8hF9oWz2BiLRYBib3il6lsAl4Ca0sI//gNM0Ztj4gB7qv1+uPz157bk0IZoN285/72l/rUZVSPIwO+QFZFK07FsyVrpAgMlHk65BiSAO4DtolZEArfXRE1g1DH/ mail@example.com
+  user-data:
+    disable_root: false
+#  late-commands:
+#    - echo 'ubnt ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/ubuntu