add og:image

gatsby-config.js

@@ -4,6 +4,7 @@ module.exports = {
     description: `Skynet is a decentralized file sharing and content distribution protocol.`,
     author: `Nebulous`,
     siteUrl: `https://siasky.net`,
+    image: `https://siasky.net/icons/icon-512x512.png`,
   },
   plugins: [
     `gatsby-plugin-sass`,

src/components/seo.js

@@ -19,6 +19,7 @@ function SEO({ lang, meta }) {
             title
             author
             description
+            image
           }
         }
       }
@@ -48,6 +49,10 @@ function SEO({ lang, meta }) {
           property: `og:type`,
           content: `website`,
         },
+        {
+          property: `og:image`,
+          content: site.siteMetadata.image,
+        },
         {
           name: `twitter:card`,
           content: `summary`,