Added .deb and .rpm package build step

src/build/scripts/postinstall.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+GETENT_USER=$(getent passwd dragoon)
+GETENT_GROUP=$(getent group dragoon)
+
+# Create the dragoon user if it doesn't already exist
+if [ "$GETENT_USER" = "" ]; then
+	useradd -r dragoon
+else
+	echo "The 'dragoon' user already exists, skipping creation."
+fi
+
+# Create the dragoon group if it doesn't already exist
+if [ "$GETENT_GROUP" = "" ]; then
+	groupadd dragoon
+	usermod -aG dragoon dragoon
+else
+	echo "The 'dragoon' group already exists, skipping creation."
+fi
+
+# Change the directory ownership of /opt and /etc
+chown -R dragoon:dragoon /etc/dragoon
+chown -R dragoon:dragoon /opt/dragoon