Added RAILS_RELATIVE_URL_ROOT support

config.ru

 # This file is used by Rack-based servers to start the application.
 require ::File.expand_path('../config/environment',  __FILE__)
-run GitlabCi::Application
+
+map ENV['RAILS_RELATIVE_URL_ROOT'] || "/" do
+  run GitlabCi::Application
+end

config/unicorn.rb

+# uncomment and customize to run in non-root path
+# ENV['RAILS_RELATIVE_URL_ROOT'] = "/gitlab-ci"
+
 app_dir = "/home/gitlab_ci/gitlab-ci/"
 worker_processes 2
 working_directory app_dir