Add config/bootstrap file

Author: marc1706

config/bootstrap.php

@@ -0,0 +1,23 @@
+<?php
+
+use Symfony\Component\Dotenv\Dotenv;
+
+require dirname(__DIR__).'/vendor/autoload.php';
+
+if (!class_exists(Dotenv::class)) {
+	throw new LogicException('Please run "composer require symfony/dotenv" to load the ".env" files configuring the application.');
+}
+
+// Load cached env vars if the .env.local.php file exists
+// Run "composer dump-env prod" to create it (requires symfony/flex >=1.2)
+if (is_array($env = @include dirname(__DIR__).'/.env.local.php') && (!isset($env['APP_ENV']) || ($_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? $env['APP_ENV']) === $env['APP_ENV'])) {
+	(new Dotenv(false))->populate($env);
+} else {
+	// load all the .env files
+	(new Dotenv(false))->loadEnv(dirname(__DIR__).'/.env');
+}
+
+$_SERVER += $_ENV;
+$_SERVER['APP_ENV'] = $_ENV['APP_ENV'] = ($_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? null) ?: 'dev';
+$_SERVER['APP_DEBUG'] = $_SERVER['APP_DEBUG'] ?? $_ENV['APP_DEBUG'] ?? 'prod' !== $_SERVER['APP_ENV'];
+$_SERVER['APP_DEBUG'] = $_ENV['APP_DEBUG'] = (int) $_SERVER['APP_DEBUG'] || filter_var($_SERVER['APP_DEBUG'], FILTER_VALIDATE_BOOLEAN) ? '1' : '0';