Redirecting you to https://habr.com/ru/post/120188/#:~:text=gem%20%E2%80%94%20%D0%BF%D0%B0%D0%BA%D0%B5%D1%82(%D1%84%D0%B0%D0%B9%D0%BB)%20%D1%81,gem%27%D0%B0%D0%BC%20%D0%BA%D0%B0%D0%BA%20%D0%BA%20%D0%B1%D0%B8%D0%B1%D0%BB%D0%B8%D0%BE%D1%82%D0%B5%D0%BA%D0%B0%D0%BC.