a few changes to make A/B testing easier

app/templates/notFound.js

@@ -0,0 +1,27 @@
+const html = require('choo/html');
+const assets = require('../../common/assets');
+
+module.exports = function(state) {
+  const div = html`
+  <div id="page-one">
+    <div id="download">
+      <div class="title">${state.translate('expiredPageHeader')}</div>
+      <div class="share-window">
+        <img src="${assets.get(
+          'illustration_expired.svg'
+        )}" id="expired-img" data-l10n-id="linkExpiredAlt"/>
+      </div>
+      <div class="expired-description">${state.translate(
+        'uploadPageExplainer'
+      )}</div>
+      <a class="send-new" href="/" data-state="notfound">${state.translate(
+        'sendYourFilesLink'
+      )}</a>
+    </div>
+  </div>`;
+
+  if (state.layout) {
+    return state.layout(state, div);
+  }
+  return div;
+};