Disable Unicorn::WorkerKiller in non-production environments

config.ru

@@ -2,12 +2,15 @@
 if defined?(Unicorn)
   require 'unicorn'
+
+  if ENV['RAILS_ENV'] == 'production' || ENV['RAILS_ENV'] == 'staging'
     # Unicorn self-process killer
     require 'unicorn/worker_killer'
     # Max memory size (RSS) per worker
     use Unicorn::WorkerKiller::Oom, (200 * (1 << 20)), (250 * (1 << 20))
   end
+end
 require ::File.expand_path('../config/environment',  __FILE__)