Function backupDate

crontab.js:199–202

(name)

    .filter((file) => file.indexOf('backup') === 0);

  const backupDate = (name) => {
    const t = name.split('backup')[1];
    return new Date(t.substring(0, t.length - 3)).valueOf();
  };

  backups.sort((a, b) => backupDate(b) - backupDate(a));
  return backups;