bin/rash in rash-shell-0.1.0 vs bin/rash in rash-shell-0.1.1

@@ -3,10 +3,11 @@
 require 'rack'
 require 'pry'
 require 'rash/shell'
 
 ENV['RACK_ENV'] ||= 'development'
-Rack::Builder.parse_file('config.ru')
+config_ru_path = ENV.fetch('CONFIG_RU_PATH', 'config.ru')
+Rack::Builder.parse_file(config_ru_path)
 
 if ARGV.empty?
   Pry.start
 else
   Pry.prompt = Pry::NO_PROMPT