Laravel 5.3作业无法读取公共文件

I have the following problem.

When I call getCountry from a Controller it works perfect but when I call it from a job I'm getting this error

The file \"assets/geoip/GeoIP2-City.mmdb\" does not exist or is not readable. at /home/vagrant/proyectos/ghc-l5/vendor/maxmind-db/reader/src/MaxMind/Db/Reader.php:46

I don't know why it works in Controllers but not in Jobs. Any idea?

<?php

namespace App\Helpers;

use GeoIp2\Database\Reader;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Log;

class SiteHelper {

    public static function getCountry($ip)
    {
        try
        {
            $reader = new Reader('assets/geoip/GeoIP2-City.mmdb');
            $record = $reader->city($ip);
            return $record->country->isoCode;
        }
        catch(\Exception $e)
        {
            Log::error("SiteHelper -> getCountry -> ERROR al detectar IP", ['ip' => $ip, 'exception' => $e]);
            throw $e;
        }
    }

}