Add Debian 13 Packer build configuration

debian-13/http/preseed.cfg

@@ -0,0 +1,48 @@
+# Select English US
+d-i debian-installer/locale string en_US
+d-i keyboard-configuration/xkb-keymap select us
+
+# Network and mirror
+d-i mirror/country string manual
+d-i mirror/http/hostname string deb.debian.org
+d-i mirror/http/directory string /debian
+d-i mirror/http/proxy string
+d-i apt-setup/cdrom/set-first boolean false
+
+# (Initial) root account setup
+d-i passwd/make-user boolean false
+d-i passwd/root-login boolean true
+d-i passwd/root-password password debian
+d-i passwd/root-password-again password debian
+
+# Time
+d-i clock-setup/utc boolean true
+d-i time/zone string UTC
+
+# Partitioning
+d-i partman-auto/method string regular
+d-i partman-auto/choose_recipe select atomic
+d-i partman/confirm_write_new_label boolean true
+d-i partman/choose_partition select finish
+d-i partman/confirm boolean true
+d-i partman/confirm_nooverwrite boolean true
+
+# Install SSH server
+tasksel tasksel/first multiselect ssh-server
+
+# Opt out of package usage survey
+popularity-contest popularity-contest/participate boolean false
+
+# Patch the new instance entirely
+d-i pkgsel/upgrade select full-upgrade
+
+# SSH configuration
+d-i preseed/late_command string \
+    in-target sed -i 's/#PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
+
+# Bootloader
+d-i grub-installer/only_debian boolean true
+d-i grub-installer/bootdev string default
+
+# Finish
+d-i finish-install/reboot_in_progress note