Implement structured data

Closes #64

_data/schema/organization.yml

@@ -0,0 +1,14 @@
+"@context": https://schema.org
+"@type": Organization
+"name": Privacy Guides
+"description": "Massive organizations are monitoring your online activities. Privacy Guides is your central privacy and security resource to protect yourself online."
+"url": 'https://www.privacyguides.org'
+"logo": 'https://www.privacyguides.org/assets/img/layout/apple-touch-icon.png'
+"sameAs":
+- 'https://www.wikidata.org/wiki/Q74788946'
+- 'https://twitter.com/privacy_guides'
+- 'https://github.com/privacyguides'
+- 'https://github.com/privacytools'
+- 'https://twitter.com/privacytoolsIO'
+"alternateName":
+- 'PrivacyTools'

_includes/head.html

@@ -21,6 +21,10 @@
   <meta property="og:locale" content="en_US" />
   <meta property="og:site_name" content="{{ site.title | escape }}" />
 
+  <script type="application/ld+json">
+    {{ site.data.schema.organization | jsonify }}
+  </script>
+
   <link rel="apple-touch-icon" sizes="180x180" href="/assets/img/layout/apple-touch-icon.png">
   <link rel="icon" type="image/png" sizes="32x32" href="/assets/img/layout/favicon-32x32.png">
   <link rel="icon" type="image/png" sizes="16x16" href="/assets/img/layout/favicon-16x16.png">

_layouts/post.html

@@ -2,6 +2,24 @@
 layout: default
 ---
 
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org/",
+  "@type": "Article",
+  "headline": "{{ page.title }}",
+  "description": "{{ page.excerpt }}",
+  "datePublished": "{{ page.date }}",
+  "publisher": {{ site.data.schema.organization | jsonify }},
+  "url": "{{ page.url | prepend: site.url }}",
+  "author": [
+    {% for author in page.author %}{"@type": "Person",
+    "name": "{{ author }}"
+    }{% unless forloop.last %}, {% endunless %}{% endfor %}
+  ]
+  {% if page.cover %}, "image": "/assets/img/blog/{{ page.cover }}"{% endif %}
+}
+</script>
+
 <div class="p-5 mb-3 text-light bg-700"{% if page.cover %} style="background-image: {{ page.color | default: "linear-gradient(to bottom, rgba(40, 50, 63, 0.3), rgba(40, 50, 63, 0.9))" }}, url(/assets/img/blog/{{ page.cover }}); background-size: cover; background-position: center;"{% endif %}>
   <div class="container">
     <div class="post-cover">