Added more Linux packaging configuration

build/scripts/postinst

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+GETENT_USER=$(getent passwd adept)
+GETENT_GROUP=$(getent group adept)
+
+# Create the adept user if it doesn't already exist
+if [ "$GETENT_USER" = "" ]; then
+	useradd -r adept
+else
+	echo "The 'adept' user already exists, skipping creation."
+fi
+
+# Create the adept group if it doesn't already exist
+if [ "$GETENT_GROUP" = "" ]; then
+	groupadd adept
+	usermod -aG adept adept
+else
+	echo "The 'adept' group already exists, skipping creation."
+fi
+
+# Change the directory ownership of /etc
+chown -R adept:adept /etc/adept