Add script to format and mount /dev/nvme0n1 in initramfs installation

src/mods/80-initramfs-update/install.sh

@@ -2,6 +2,17 @@ set -e                  # exit on error
 set -o pipefail         # exit on pipeline error
 set -u                  # treat unset variable as error
 
+
+# Automatically update /etc/casper.conf
+# Mount /dev/nvme0n1 to /cow
+mkdir -p /scripts/casper-premount
+echo << EOF > /scripts/casper-premount/10-format.cow
+#!/bin/sh
+set -euo pipefail
+mkfs.ext4 -F -L casper-rw /dev/nvme0n1p1
+EOF
+chmod +x /scripts/casper-premount/10-format.cow
+
 # Update initramfs
 update-initramfs -u -k all
 judge "Update /etc/casper.conf"