add selinux install hook

pephooks/normal/0720-install-selinux-hook.chroot

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# SPDX-FileCopyrightText:  2023 PeppemrintOS Team  (peppermintosteam@proton.me)
+
+# Disable AppArmor service
+systemctl disable apparmor --now
+
+# Install SELinux packages 
+apt install policycoreutils selinux-utils selinux-basics selinux-policy-default policycoreutils-python-utils
+
+# Activate SELinux
+selinux-activate 
+
+# Reload the services
+systemctl daemon-reload
+
+echo "Completed."
+
+