add canonical meta tags to pages

Author: Aytackydln

themes/aurora/layouts/partials/head.html

@@ -2,6 +2,7 @@
 <meta name="viewport" content="width=device-width,initial-scale=1">
 
 {{ with .Permalink }}
+    <link rel="canonical" href="{{ . }}">
     <meta property="og:url" content="{{ . }}">
 {{ end }}
 <meta property="og:type" content="website">