Error 403 - forbidden after adding letsencrypt

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okay, so I added /public at the end of the path in both http and https blocks and I added index.php to the index line. The 403 error is still here and it now downloads me a file everytime I access the site :

<?php

use Illuminate\Http\Request;

define('LARAVEL_START', microtime(true));

// Determine if the application is in maintenance mode...
if (file_exists($maintenance = __DIR__.'/../storage/framework/maintenance.php')) {
    require $maintenance;
}

// Register the Composer autoloader...
require __DIR__.'/../vendor/autoload.php';

// Bootstrap Laravel and handle the request...
(require_once __DIR__.'/../bootstrap/app.php')
    ->handleRequest(Request::capture());