feat(backstage.io): Allow to zoom images like Medium

microsite/static/css/custom.css

@@ -1094,3 +1094,8 @@ code {
     margin: 0 1.5em;
   }
 }
+
+/* Zoomed images using the medium-zoom library should be on top of screen. */
+.medium-zoom-image {
+  z-index: 10000;
+}

microsite/static/js/medium-zoom.js

@@ -0,0 +1,11 @@
+// Ref: https://github.com/francoischalifour/medium-zoom#options
+window.addEventListener(
+  'load',
+  () => {
+    mediumZoom('[data-zoomable]', {
+      margin: 20,
+      background: '#000',
+    });
+  },
+  false,
+);