Update post.html

Author: Daniele-rolli

_layouts/post.html

@@ -33,7 +33,14 @@
     <meta property="og:type" content="article" />
     <meta property="og:title" content="{{ page.title }}" />
     <meta property="og:description" content="{{ page.excerpt | strip_html }}" />
-    <meta property="og:image" content="{{ site.baseurl }}/{{ page.image }}" />
+    {% if page.image %}
+    <meta
+      property="og:image"
+      content="{{ page.url | prepend: site.baseurl | prepend: site.url }}{{ page.image.path }}"
+    />
+    <meta property="og:image:width" content="{{ page.image.width }}" />
+    <meta property="og:image:height" content="{{ page.image.height }}" />
+    {% endif %}
     <meta property="og:url" content="{{ site.url }}/{{ page.url }}" />
     <meta property="og:site_name" content="{{ site.title }}" />