$defaultConfig = $defaultConfig = (new Mpdf\Config\ConfigVariables())->getDefaults();
$pdfConfig = [
    "autoScriptToLang" => true,
    "autoLangToFont" => true,
    "setAutoTopMargin" => "stretch",
    "setAutoBottomMargin" => "stretch",
    "autoMarginPadding" => 10,
    'tempDir' => app()->getRuntimePath(),
    'mode' => 'UTF-8',
    'format' => 'A3',
    'default_font_size' => 14,
    'margin_right' => 12,
    'margin_left' => 12,
    'fontDir' => array_merge($defaultConfig['fontDir'], [public_path() . 'font'])
];
$mPdf = new Mpdf($pdfConfig);