feat: add correct link to article in new site

Thanks to the changes in electronjs.org-new we can now generate a
direct link to the exact article a user is visiting to make the
transition from one to another easier.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Rel cf657d5f30

server.js

@@ -84,6 +84,17 @@ app.use(
     referrerPolicy: false,
   })
 )
+
+// Helper to generate the redirects to the right document in the new docs paths
+hbs.registerHelper('new-docs', (currentPage) => {
+  // This particular page is the root for the docs in the new site
+  if (!currentPage || currentPage.endsWith('tutorial/introduction')) {
+    return '/docs/latest/'
+  } else {
+    return currentPage.replace('docs/', 'docs/latest/')
+  }
+})
+
 if (isProduction) {
   const jsManifest = require(path.join(
     __dirname,

views/partials/new-docs.hbs

@@ -1,3 +1,3 @@
 <div class="announcement-banner-contrast">
-  Want to check our <a href="/docs/latest/">beta docs site</a>? We'd love your feedback.
+  Want to check our <a href="{{new-docs page.url}}">beta docs site</a>? We'd love your feedback.
 </div>