simplified, removed --name etc

Conflicts with custom netboot script that provides essential tmpfs overlay.
cloud-initramfs-rooturl mounts squashfs read-only, but diskless nodes need
writable overlay for /var/log, /tmp, /etc, and runtime state.

Fixes: Can't open blockdev error during boot

build-image.sh

@@ -61,7 +61,6 @@ apt-get upgrade -y
 apt-get install -y \
     linux-image-generic \
     linux-firmware \
-    cloud-initramfs-rooturl \
     busybox-initramfs \
     initramfs-tools \
     keyboard-configuration \

http/boot.ipxe

@@ -1,10 +1,10 @@
 #!ipxe
 echo Booting Ubuntu Noble K3s Node via iPXE
-echo Loading kernel from http://192.168.100.1:8800/vmlinuz
-kernel --name vmlinuz http://192.168.100.1:8800/vmlinuz
-echo Loading initramfs from http://192.168.100.1:8800/initrd-netboot.img
-initrd --name initrd http://192.168.100.1:8800/initrd-netboot.img
+echo Loading kernel...
+kernel http://192.168.100.1:8800/vmlinuz
+echo Loading initramfs...
+initrd http://192.168.100.1:8800/initrd-netboot.img
 echo Setting kernel arguments for HTTP root mounting
-imgargs vmlinuz boot=netboot root=http://192.168.100.1:8800/filesystem.squashfs rootfstype=squashfs overlayroot=tmpfs ip=dhcp console=tty0 console=ttyS0,115200 earlyprintk=serial,ttyS0,115200 loglevel=7
+imgargs vmlinuz initrd=initrd-netboot.img boot=netboot root=http://192.168.100.1:8800/filesystem.squashfs rootfstype=squashfs overlayroot=tmpfs ip=dhcp console=tty0 console=ttyS0,115200 loglevel=7
 echo Booting system...
-boot vmlinuz
+boot