fix: update preseed for automated installation with user-specified values

- Changed domain from local to knel.net
- Changed username from kneluser to football
- Removed sudo from user groups (football user not a sudoer)
- Added debconf priority critical to suppress non-essential questions
- Added console-setup/layoutcode and variantcode
- Added popularity-contest participation = false
- Added apt-setup options to skip contrib/non-free/backports prompts
- Added base-installer/kernel/image selection
- Added netcfg/confirm_static

Installation should now only prompt for:
1. Root password
2. User password (football)
3. Encryption passphrase

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

config/preseed.cfg

@@ -1,15 +1,23 @@
-# Localization
-d-i debian-installer/locale string en_US
+# Localization - suppress all locale questions
+d-i debian-installer/locale string en_US.UTF-8
+d-i debian-installer/supported_locales multiselect en_US.UTF-8
 d-i console-setup/ask_detect boolean false
-d-i console-keymaps-at/keymap select us
+d-i console-setup/layoutcode string us
+d-i console-setup/variantcode string
 
 # Keyboard
 d-i keyboard-configuration/xkb-keymap select us
+d-i keyboard-configuration/toggle select No toggling
 
-# Network configuration (no network config - will be configured via WireGuard)
+# Set debconf priority to critical to suppress non-essential questions
+d-i debconf/priority select critical
+
+# Network configuration
 d-i netcfg/choose_interface select auto
+d-i netcfg/disable_autoconfig boolean false
 d-i netcfg/get_hostname string knel-football
-d-i netcfg/get_domain string local
+d-i netcfg/get_domain string knel.net
+d-i netcfg/hostname string knel-football
 
 # Mirror configuration
 d-i mirror/country string manual
@@ -25,8 +33,8 @@ d-i clock-setup/ntp boolean true
 # User setup
 # SECURITY: Passwords are prompted during installation, not hardcoded
 # This ensures each installation has unique credentials
-d-i passwd/user-fullname string KNEL User
-d-i passwd/username string kneluser
+d-i passwd/user-fullname string football user
+d-i passwd/username string football
 # Force password prompt during installation
 d-i passwd/user-password-crypted string !
 d-i passwd/root-password-crypted string !
@@ -34,7 +42,7 @@ d-i passwd/root-login boolean true
 
 # Password quality enforcement (MANDATORY for tier0 security)
 d-i passwd/make-user boolean true
-d-i passwd/user-default-groups string sudo,audio,video,plugdev,input,cdrom,floppy
+d-i passwd/user-default-groups string audio,video,plugdev,input,cdrom,floppy
 
 # PAM password quality configuration (enforced in installed system)
 # This will be configured in post-installation hooks
@@ -110,10 +118,25 @@ d-i grub-installer/with_other_os boolean false
 d-i grub-installer/bootdev string default
 d-i grub-installer/force-efi-extra-removable boolean true
 
+# Popularity contest - do not participate
+popularity-contest popularity-contest/participate boolean false
+
 # Security configuration
 d-i security/updates select none
 d-i passwd/shadow boolean true
 
 # Finish
 d-i finish-install/reboot_in_progress note
-d-i cdrom-detect/eject boolean false
+d-i cdrom-detect/eject boolean false
+
+# Skip additional prompts
+d-i apt-setup/contrib boolean false
+d-i apt-setup/non-free boolean false
+d-i apt-setup/backports boolean false
+d-i apt-setup/services-select multiselect
+
+# Don't ask about kernel flavors
+d-i base-installer/kernel/image select linux-image-amd64
+
+# Don't ask about hostname confirmation
+d-i netcfg/confirm_static boolean true