Refine .env.example files across all stacks

- Streamline variable organization and formatting
- Reduce redundant comments and improve clarity
- Maintain all required variables for each stack

docker-compose/utilities/.env.example

@@ -1,27 +1,21 @@
 # Utilities Stack Environment Variables
-# These variables are used for backup and utility services
 
-# Base Configuration
-DOMAIN=
 TZ=
-
-# User Configuration
 PUID=
 PGID=
+SERVER_IP=
+SERVER_HOSTNAME=
+DOMAIN=
 
-# Directory Configuration
 STACKS_DIR=
 
-# Bitwarden Configuration
+FORMIO_JWT_SECRET=
+FORMIO_DB_SECRET=
+
 BITWARDEN_SIGNUPS_ALLOWED=
 BITWARDEN_INVITATIONS_ALLOWED=
 BITWARDEN_ADMIN_TOKEN=
 
-# Form.io Configuration
-FORMIO_JWT_SECRET=
-FORMIO_DB_SECRET=
-
-# SMTP Configuration (Optional for Bitwarden)
 SMTP_HOST=
 SMTP_PORT=
 SMTP_USERNAME=