<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="shortcut icon" type="image/png" href="../assets/content_imgs/favicon.ico"/>

  <title>[{{ page.chapter_number }}] {{ page.title }}</title>
  <meta name="description" content="{{ page.excerpt }}">
  <link rel="canonical" href="{{ site.url }}{{ site.baseurl }}{{ page.url }}">

  <meta property="og:url" content="{{ site.url }}{{ site.baseurl