backup/restore: use MONGO_SERVICE variable for service name

restore.sh

@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+# Configuration
+MONGO_SERVICE="utility-bills-tracker_mongo"
+
 # Usage: ./restore.sh <timestamp>
 # Example: ./restore.sh 2025-08-24-14-30
 
@@ -37,7 +40,7 @@ fi
 
 # Scale down mongo service
 echo "Scaling down mongo service..."
-docker service scale utility-bills-tracker_mongo=0
+docker service scale "$MONGO_SERVICE"=0
 
 # Backup current volume (just in case)
 SAFETY_BACKUP="mongo-volume-pre-restore-$(date +%Y-%m-%d-%H-%M).tar.gz"
@@ -58,7 +61,7 @@ sudo chown -R 999:999 mongo-volume
 
 # Scale mongo service back up
 echo "Scaling mongo service back up..."
-docker service scale utility-bills-tracker_mongo=1
+docker service scale "$MONGO_SERVICE"=1
 
 echo "Restore completed successfully!"
 echo "Safety backup saved as: $SAFETY_BACKUP"