Add customization mecanism for keyboard layout, hostname, username:password and root password with the config file

stage1/01-sys-tweaks/00-run.sh

@@ -5,11 +5,9 @@ install -m 644 files/noclear.conf "${ROOTFS_DIR}/etc/systemd/system/[email protected]
 install -v -m 644 files/fstab "${ROOTFS_DIR}/etc/fstab"
 
 on_chroot << EOF
-if ! id -u pi >/dev/null 2>&1; then
-	adduser --disabled-password --gecos "" pi
+if ! id -u ${RPI_USERNAME} >/dev/null 2>&1; then
+	adduser --disabled-password --gecos "" ${RPI_USERNAME}
 fi
-echo "pi:raspberry" | chpasswd
-echo "root:root" | chpasswd
+echo "${RPI_USERNAME}:${RPI_USERPASS}" | chpasswd
+echo "root:${RPI_ROOTPASS}" | chpasswd
 EOF
-
-