🏗 Change demos structure

gatsby-config.js

@@ -0,0 +1,14 @@
+const fs = require(`fs`)
+const metadataFile = `./content/metadata.json`
+const metadata = fs.existsSync(metadataFile) ? require(metadataFile) : ''
+
+module.exports = {
+  plugins: [
+    {
+      resolve: `@marscollective/gatsby-theme-link-free`,
+      options: {
+        metadata
+      }
+    }
+  ]
+}