Adds host.docker so we can run Sitespeed locally

config/initializers/rails_host_authorization.rb

@@ -3,7 +3,7 @@
 # This file requires config/initializers/1_settings.rb
 
 if Rails.env.development?
-  Rails.application.config.hosts += [Gitlab.config.gitlab.host, 'unix']
+  Rails.application.config.hosts += [Gitlab.config.gitlab.host, 'unix', 'host.docker.internal']
 
   if ENV['RAILS_HOSTS']
     additional_hosts = ENV['RAILS_HOSTS'].split(',').select(&:presence)