feat: add default og:image for non page sites

_config.yml

@@ -24,6 +24,7 @@ description: >- # this means to ignore newlines until "baseurl:"
   Understand and mitigate security threats others won't see coming. 
 baseurl: "" # the subpath of your site, e.g. /blog
 url: "https://distrust.co" # the base hostname & protocol for your site, e.g. http://example.com
+banner: "https://distrust.co/assets/base/distrust-logo.png"
 
 header_pages:
 - index.md

_includes/head.html

@@ -16,6 +16,7 @@
   <meta content="{{ page.title }}" property="og:title" />
   <meta content="article" property="og:type" />
   {% else %}
+  <meta content="{{ site.banner }}" property="og:image" />
   <meta content="{{ site.title }}" property="og:title" />
   <meta content="website" property="og:type" />
   {% endif %} {% if page.summary %}