<!DOCTYPE html>
<html lang="{{ site.lang | default: " en-US" }}">
<head>
    {% if site.google_analytics %}
    <script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
    <script>
        window.dataLayer = window.dataLayer || [];

        function gtag() {
            dataLayer.push(arguments);
        }

        gtag('js', new Date());
        gtag('config', '{{ site.google_analytics }}');
        var app;
    </script>
    {% endif %}
    <meta charset="UTF-