Railsサーバーを起動しようとすると、このエラーが表示されます
C:\Arthur\Ruby\Aplicações em ruby\blog>rails server
=> Booting WEBrick
=> Rails 3.2.6 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
C:/Arthur/Ruby/Aplicações em ruby/blog/config.ru:4:in `require': cannot load such file --
C:/Arthur/Ruby/Aplicações em ruby/blog/config/environment (LoadError)
from C:/Arthur/Ruby/Aplicações em ruby/blog/config.ru:4:in `block in <main>'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `ins
tance_eval'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `ini
tialize'
from C:/Arthur/Ruby/Aplicações em ruby/blog/config.ru:1:in `new'
from C:/Arthur/Ruby/Aplicações em ruby/blog/config.ru:1:in `<main>'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eva
l'
.
.
.
RailsでRubyを使用するために何をする必要がありますか?