Specify canonical url

Author: steos

themes/lingual/layouts/partials/head.html

@@ -8,6 +8,7 @@
   {{ end }}
 </title>
 <link rel="icon" href="/logo20_v1.2.1.svg" />
+<link rel="canonical" href="{{ .Permalink }}" />
 <script
   defer
   src="https://cloud.umami.is/script.js"