fix: Update default passwd configuration to allow root user to change the password

matter-base/main.sh

@@ -51,6 +51,10 @@ check_ret() {
 #################
 ## main script ##
 #################
+if [ "$EUID" -ne 0 ]; then
+  error "You should run this script as root"
+fi
+
 if [ $# -eq 0 ]; then
   error "Please specify a name for the archive"
 fi
@@ -80,7 +84,7 @@ pushd $TARGET > /dev/null
   ln -sf usr/sbin sbin
 
   cat > etc/passwd << "EOF"
-root:x:0:0:root:/root:/bin/bash
+root:!:0:0:root:/root:/bin/bash
 bin:x:1:1:bin:/dev/null:/usr/bin/false
 daemon:x:6:6:Daemon User:/dev/null:/usr/bin/false
 messagebus:x:18:18:D-Bus Message Daemon User:/run/dbus:/usr/bin/false

matter-iso/main.sh

@@ -99,6 +99,10 @@ check_iso_vars() {
 #################
 ## main script ##
 #################
+if [ "$EUID" -ne 0 ]; then
+  error "You should run this script as root"
+fi
+
 if [ $# -ne 2 ]; then
   error "Please specify a release archive and a config directory"
 fi
@@ -146,6 +150,7 @@ set_indent
     info "Removing $e"
     rm -rf "$TMPDIR/$e"
   done
+  rm -rf "$TMPDIR/.git"
 unset_indent
 
 info "Extracting release archive"