public function build(array $config)
    {
        $output = [];

        // Fix output dir trailing slash
        if ('/' !== substr($config['output_dir'], -1) && strlen($config['output_dir']) > 0) {
            $config['output_dir'] .= '/';
        }

        if ($config['bootstrap_css']['enabled']) {
            $output['bootstrap_css'] = $this->buildBootstrapCss($config);
        }
        if ($config['content_css']['enabled']) {
            $output['content_css'] = $this->buildContentCss($config);
        }

        $output['twig_js'] = $this->buildTwigJs($config);
        $output['form_css'] = $this->buildFormCss($config);

        return $output;
    }