Add ubuntu desktop autoinstall

Author: taylorific

autoinstall/simplynuc/NUC9v7QNX/ubuntu-desktop-2404-autoinstall/README.md

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+```
+curl -LO https://releases.ubuntu.com/24.04.2/ubuntu-24.04.2-desktop-amd64.iso
+% shasum -a 256 ubuntu-24.04.2-desktop-amd64.iso
+d7fe3d6a0419667d2f8eff12796996328daa2d4f90cd9f87aa9371b362f987bf  ubuntu-24.04.2-desktop-amd64.iso
+
+docker pull docker.io/boxcutter/ubuntu-autoinstall
+docker run -it --rm \
+  --mount type=bind,source="$(pwd)",target=/data \
+  docker.io/polymathrobotics/ubuntu-autoinstall \
+    -a autoinstall.yaml \
+    -g grub.cfg \
+    -i \
+    -s ubuntu-24.04.2-desktop-amd64.iso \
+    -d ubuntu-autoinstall-NUC9v7QNX.iso
+```
+curl -LO https://releases.ubuntu.com/24.04.2/ubuntu-24.04.2-live-server-amd64.iso
+% shasum -a 256 ubuntu-24.04.2-live-server-amd64.iso
+d6dab0c3a657988501b4bd76f1297c053df710e06e0c3aece60dead24f270b4d  ubuntu-24.04.2-live-server-amd64.iso
+
+docker pull docker.io/boxcutter/ubuntu-autoinstall
+docker run -it --rm \
+  --mount type=bind,source="$(pwd)",target=/data \
+  docker.io/polymathrobotics/ubuntu-autoinstall \
+    -a autoinstall.yaml \
+    -g grub.cfg \
+    -i \
+    -s ubuntu-24.04.2-live-server-amd64.iso \
+    -d ubuntu-autoinstall-NUC9v7QNX.iso

autoinstall/simplynuc/NUC9v7QNX/ubuntu-desktop-2404-autoinstall/autoinstall.yaml

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+#cloud-config
+autoinstall:
+  version: 1
+  network:
+    version: 2
+    ethernets:
+      # Intel I219-LM interface that supports vPro/AMT pass-through
+      eno1:
+        dhcp4: true
+        dhcp6: false
+        optional: true
+      # Intel I210-AT standalone gigabit ethernet
+      enp113s0:
+        dhcp4: true
+        dhcp6: false
+        optional: true
+      wlp4s0:
+        dhcp4: true
+        dhcp6: false
+        optional: true
+    bridges:
+      br0:
+        interfaces:
+          - eno1
+        dhcp4: true
+        dhcp6: false
+  storage:
+    layout:
+      name: lvm
+      sizing-policy: all
+  ssh:
+    install-server: true
+    allow-pw: true
+  late-commands:
+    # Because we're using preserve_hostname to allow manual setting
+    # of the hostname, set an initial hostname manually
+    - echo robot00 > /target/etc/hostname
+    - curtin in-target -- sed -ie 's/GRUB_TIMEOUT=.*/GRUB_TIMEOUT=30/' /etc/default/grub
+    - curtin in-target -- sed -ie 's/GRUB_TIMEOUT_STYLE=.*/GRUB_TIMEOUT=countdown/' /etc/default/grub
+    - curtin in-target -- update-grub
+  user-data:  # cloud-init starts here
+    preserve_hostname: true
+    users:
+      - name: automat
+        uid: 63112
+        primary_group: users
+        groups: users
+        shell: /bin/bash
+        plain_text_passwd: superseekret
+        sudo: ALL=(ALL) NOPASSWD:ALL
+        lock_passwd: false
+        ssh_authorized_keys:
+          # taylor
+          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINRK4hkcpUiaSkiLEytgwMYcKylBioXPLx1TnwJFrLPl mahowald
+          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINy9cJcJl8oN6bRtcBc4RZq8f/T6P1AFR3YS1YRYi5YY sheila
+          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHGTw44QBehDXY6ebitrYydyAAhDFLBSkQ59RovcVsvX joan
+          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMWwrOVfOWfax6HR4Y+Mg01jT9No2zXHqkATnqwHuFKU emily
+    chpasswd: {expire: false}
+    ssh_pwauth: true

autoinstall/simplynuc/NUC9v7QNX/ubuntu-desktop-2404-autoinstall/grub.cfg

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+set timeout=30
+
+loadfont unicode
+
+set menu_color_normal=white/black
+set menu_color_highlight=black/light-gray
+
+menuentry "Ubuntu Desktop Autoinstall" {
+        set gfxpayload=keep
+        linux   /casper/vmlinuz autoinstall ds=nocloud\;s=/cdrom/nocloud/  ---
+        initrd  /casper/initrd
+}
+menuentry "Try or Install Ubuntu" {
+	set gfxpayload=keep
+	linux	/casper/vmlinuz  --- quiet splash
+	initrd	/casper/initrd
+}
+menuentry "Ubuntu (safe graphics)" {
+	set gfxpayload=keep
+	linux	/casper/vmlinuz nomodeset  --- quiet splash
+	initrd	/casper/initrd
+}
+grub_platform
+if [ "$grub_platform" = "efi" ]; then
+menuentry 'Boot from next volume' {
+	exit 1
+}
+menuentry 'UEFI Firmware Settings' {
+	fwsetup
+}
+else
+menuentry 'Test memory' {
+	linux16 /boot/memtest86+x64.bin
+}
+fi