refactor: move index.php to public, add env example

.env.example

@@ -0,0 +1,13 @@
+# DATABASE CONFIGURATION
+
+# Soon:
+# DRIVER=pdo
+# ENGINE=mariadb
+
+DB_HOST=localhost
+DB_PORT=3306
+DB_USER=
+DB_PASSWORD=
+DB_NAME=
+DB_CHARSET=utf8mb4
+DB_COLLATION=utf8mb4_unicode_ci

public/index.php

@@ -6,7 +6,7 @@ use DI\Container;
 use Controllers\HomeFrontController;
 use Slim\Handlers\Strategies\RequestResponseArgs;
 
-require_once __DIR__ . '/vendor/autoload.php';
+require_once __DIR__ . '/../vendor/autoload.php';
 
 $container = new Container();
 $app = Bridge::create($container);