_layouts/default.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <link rel="stylesheet" type="text/css" href="/assets/css/styles.css" />
    <link rel="icon" type="image/png" href="/assets/images/favicon.png" />
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta
      name="description"
      content="Chaincode Labs exists to support Bitcoin"
    />
    <meta name="twitter:card" content="summary_large_image" />
    <meta name="twitter:site" content="@{{ site.twitter_username }}" />
    <meta name="twitter:title" content="{{ page.title }}" />
    {% if page.card_image %}
    <meta name="twitter:image" content="{{ site.url }}{{ page.card_image }}">
    {% else %}
    <meta name="twitter:image" content="{{ site.url }}{{ page.image }}">
    {% endif %}
    <title>{{ page.title }}</title>
  </head>
  <body>
    {% include navigation.html %}
    <main>{{ content }}</main>
  </body>
</html>