SEO improvement (#162)

* SEO improvement

* fix

Author: jcabak

_layouts/base.html

@@ -9,6 +9,9 @@
   {% endif %}
   <meta name="author" content="Apple Inc." />
   <meta name="viewport" content="width=device-width initial-scale=1" />
+  {% if page.excerpt %}
+  <meta name="description" content="{{ page.excerpt | strip_html | escape }}">
+  {% endif %}
   <link rel="license" href="/LICENSE.txt" />
   <link rel="stylesheet" media="all" href="/assets/stylesheets/application.css" />
   <link rel="shortcut icon" sizes="16x16 24x24 32x32 48x48 64x64" type="image/vnd.microsoft.icon" href="/favicon.ico" />

server/index.md

@@ -41,7 +41,7 @@ The Swift Server workgroup:
 * Defines and run an incubation process for these efforts to reduce duplication of effort, increase compatibility and promote best practices
 * Channels feedback for Swift language features needed by the server development community to the Swift Core Team
 
-Read more about the workgroup and server incubator it runs [here]({{site.url}}/sswg).
+Read more about the workgroup and server incubator it runs [here]({{site.url}}/sswg "Swift Server Workgroup").
 
 ## Development guides