Created new Installer module and moved everything from CLI there

module/Installer/src/ConfigProvider.php

@@ -0,0 +1,15 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Installer;
+
+use Zend\Config\Factory;
+use Zend\Stdlib\Glob;
+
+class ConfigProvider
+{
+    public function __invoke()
+    {
+        return Factory::fromFiles(Glob::glob(__DIR__ . '/../config/{,*.}config.php', Glob::GLOB_BRACE));
+    }
+}