add check for available backups

functions/backup

@@ -38,6 +38,11 @@ function backup_list() {
   local backupdir="$(getValueByKey 'PODMAN_DIRECTORY')/${1}/backup"
   local found_backups=($(find "$backupdir" -type f -print))
 
+  if [[ "${#found_backups[@]}" -eq 0 ]]; then
+    log i "No backups found for '$1'"
+    exit 0
+  fi
+
   log i "Found ${#found_backups[@]} backups:"
   for backup in "${found_backups[@]}"; do
     echo "- $(basename ${backup%%.*})"