Add Go module hosting

pages/gomod.rb

@@ -0,0 +1,22 @@
+class Pages::GoMod < ::Phlex::HTML
+  def initialize(import, repo)
+    @import = import
+    @repo = repo
+  end
+  def view_template
+    meta = @post[:data].front_matter
+    render ::Pages::Layout.new({title: meta['title']}, meta: {
+      "go-import" => "#{import} git #{repo}"
+    }) {
+      p {
+        h1 { @import }
+        p {
+          plain "This is a generated page to host the Go module located at "
+          a(href: repo) { repo }
+          plain ". You'll probably find more information about it over there."
+        }
+      }
+    }
+  end
+end
+