fix(aws-backup.sh): add exit mode if no files/folders written

scripts/aws-backup.sh

@@ -56,6 +56,10 @@ if [[ "$1" == "clean" ]]; then
     exit 0
 fi
 
+if [[ ! -s "BACKUP" ]]; then
+	exit 0
+fi
+
 while IFS= read -r SOURCE_PATH || [ -n "$SOURCE_PATH" ]; do
     if [[ -z "$SOURCE_PATH" || "$SOURCE_PATH" =~ ^[[:space:]]*$ ]]; then
         continue
@@ -102,4 +106,4 @@ if [[ "$BACKUP_SUCCESS" == true ]]; then
     send_notification "<b>💿 AWS Backup 💿 :</b> All files successfully backed up."
 else
     send_notification "<b>💿 AWS Backup 💿 :</b> One or more files failed to back up. Check the log for details."
-fi
+fi