Remove some css causing errors in precompile

Remove the image in announcement index
Set the db to test_site

config/mongoid.yml

@@ -21,4 +21,4 @@ production:
   # password: <%= ENV['MONGOID_PASSWORD'] %>
   # database: <%= ENV['MONGOID_DATABASE'] %>
   <<: *defaults
-  database: demo_site_production
+  database: test_site