Add a better cropped image

app/views/about/index.html.haml

@@ -6,9 +6,9 @@
   %meta{ property: 'og:type', content: 'website' }/
   %meta{ property: 'og:title', content: Rails.configuration.x.local_domain }/
   %meta{ property: 'og:description', content: "Mastodon is a free, open-source social network server. A decentralized alternative to commercial platforms, it avoids the risks of a single company monopolizing your communication. Anyone can run Mastodon and participate in the social network seamlessly" }/
-  %meta{ property: 'og:image', content: asset_url('mastodon.jpg') }/
-  %meta{ property: 'og:image:width', content: '1400' }/
-  %meta{ property: 'og:image:height', content: '1488' }/
+  %meta{ property: 'og:image', content: asset_url('mastodon_small.jpg') }/
+  %meta{ property: 'og:image:width', content: '400' }/
+  %meta{ property: 'og:image:height', content: '400' }/
 
 .wrapper
   %h1