Bind Guzzle Laravel Lumen

app.php

<?php 
/**
 * FIXME: This really is just for one paritulcar type of jobs,
 * not everything we would want to use guzzle for.
 **/

$app->bind('\GuzzleHttp\ClientInterface', function ($app) {
    return new \GuzzleHttp\Client([
        'base_uri' => env('MAIN_SITE_URL'),
        'connect_timeout' => 5,
        'http_errors' => false
    ]);
});