google auth update

app/views/docs/index.html.haml

@@ -1,5 +1,3 @@
-%p= link_to 'Login with Google', auth_at_provider_path(provider: :google)
-
--#
-  %h2 Something more helpful later
-  %p= raw(ap @doc)
+%p
+  = link_to auth_at_provider_path(provider: :google) do
+    = image_tag 'btn_google_signin_light_normal_web@2x.png', size: '50%'