site/_includes/top.html

<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="UTF-8">
    <title>Apache Arrow Homepage</title>
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="generator" content="Jekyll v{{ jekyll.version }}">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <link rel="icon" type="image/x-icon" href="{{ site.baseurl }}/favicon.ico">

    <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">

    <link href="{{ site.baseurl }}/css/main.css" rel="stylesheet">
    <link href="{{ site.baseurl }}/css/syntax.css" rel="stylesheet">
    <script src="https://code.jquery.com/jquery-3.2.1.min.js"
            integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
            crossorigin="anonymous"></script>
    <script src="{{ site.baseurl }}/assets/javascripts/bootstrap.min.js"></script>
    {% if jekyll.environment == 'production' %}
    {% include analytics.html %}
    {% endif %}
  </head>