GRN-93: Fix for issue with excesive requests to LB (#447)

* Fix for issue with excesive requests to lb

* Fixed issue with rspec on users not passing when run alone

* Include dotenv in production

app/controllers/application_controller.rb

@@ -111,7 +111,7 @@ class ApplicationController < ActionController::Base
     @user_domain = if Rails.env.test? || !Rails.configuration.loadbalanced_configuration
       "greenlight"
     else
-      parse_user_domain(request.env["SERVER_NAME"])
+      parse_user_domain(request.host)
     end
   end
   helper_method :set_user_domain