Fixed seo page description

Signed-off-by: Blagovest Petrov <blagovest@petrovs.info>

layouts/partials/head.html

@@ -11,8 +11,13 @@
     <link rel="icon" href="{{ .Site.BaseURL }}/favicon.ico">
     <link rel="canonical" href="{{ .Site.BaseURL }}">
     <link rel="alternate" type="application/atom+xml" title="Atom 2.0" href="https://petrovs.info/index.xml">
-    <meta name="description" content="{{ .Site.Params.Description }}">
+    <meta name="description" content="{{ with .Description }}
-
+{{ . }}
+{{ else }}
+{{if .IsPage}}{{ .Summary }}
+{{ else }}{{ with .Site.Params.description }}
+{{ . }}
+{{ end }}{{ end }}{{ end }}">
     {{/* Don't ask why it's like this. This original theme is a mess... */}}
     <!-- <noscript><style>body { visibility: visible }</style></noscript> -->
 </head>