Add nginx syntax highlighting

assets/javascripts/views/pages/nginx.coffee

@@ -0,0 +1,6 @@
+#= require views/pages/base
+
+class app.views.NginxPage extends app.views.BasePage
+  prepare: ->
+    @highlightCode @findAllByTag('pre'), 'nginx'
+    return

assets/stylesheets/pages/_nginx.scss

@@ -3,4 +3,5 @@
   .note { @extend %note; }
   .directive { margin: 2.5em 0 1em; }
   td > pre { margin: 0; }
+  dt > code { @extend %label; }
 }

lib/docs/filters/nginx/clean_html.rb

@@ -22,6 +22,10 @@ module Docs
           at_css('h1 + table').replace("<ul><li>#{links.join('</li><li>')}</li></ul>")
         end
 
+        css('td > pre').each do |node|
+          node.name = 'code'
+        end
+
         doc
       end
     end