improvements to basic header

layouts/partials/head.html

@@ -73,6 +73,7 @@
     {{ $bundleJS := $assets.Get "js" | resources.Concat "js/main.bundle.js" | resources.Minify | resources.Fingerprint "sha512" }}
     <script defer type="text/javascript" id="script-bundle" src="{{ $bundleJS.RelPermalink }}" integrity="{{ $bundleJS.Data.Integrity }}" data-copy="{{ i18n "code.copy" }}" data-copied="{{ i18n "code.copied" }}"></script>
   {{ end }}
+  <script src="/js/zoom.min.js"></script>
   {{/* Icons */}}
   {{ if templates.Exists "partials/favicons.html" }}
     {{ partialCached "favicons.html" .Site }}