backup/restore: use MONGO_SERVICE variable for service name

backup.sh

@@ -1,8 +1,11 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+# Configuration
+MONGO_SERVICE="utility-bills-tracker_mongo"
+
 # scale down mongo service while we copy its volume
-docker service scale utility-bills-tracker_mongo=0
+docker service scale "$MONGO_SERVICE"=0
 
 # timestamp for filename
 TIMESTAMP=$(date +"%Y-%m-%d-%H-%M")
@@ -30,4 +33,4 @@ if [ "$KEEP" -gt 0 ]; then
 fi
 
 # bring mongo service back up
-docker service scale utility-bills-tracker_mongo=1
+docker service scale "$MONGO_SERVICE"=1

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"