Merge pull request #519 from outline/jori/prefetch

Added link=“prefetch” tags

server/pages/components/Layout.js

@@ -5,6 +5,7 @@ import { TopNavigation, BottomNavigation } from './Navigation';
 import Analytics from '../../../shared/components/Analytics';
 import globalStyles from '../../../shared/styles/globals';
 import { color } from '../../../shared/styles/constants';
+import prefetchTags from '../../utils/prefetchTags';
 
 export const title = 'Outline';
 export const description =
@@ -55,10 +56,7 @@ export default function Layout({ children }: Props) {
             href="/favicon-32.png"
             sizes="32x32"
           />
-          <link
-            rel="dns-prefetch"
-            href={process.env.AWS_S3_UPLOAD_BUCKET_URL}
-          />
+          {prefetchTags}
         </Helmet>
         <Analytics />