Add viewport meta tag to prevent mobile scaling

Author: joecan

src/backend/Generate.hs

@@ -64,6 +64,7 @@ htmlSkeleton analytics highlight title scripts =
   H.docTypeHtml $ do
     H.head $ do
       H.meta ! A.charset "UTF-8"
+      H.meta ! A.name "viewport" ! A.content "width=device-width, initial-scale=1"
       H.title (H.toHtml title)
       favicon
       H.link ! A.rel "stylesheet" ! A.href "/assets/style.css?v=3"