What is dry-rb and how it might help solve problems with a Rails app

What is dry-rb? We are discussing the four problems we’ve managed to solve using dry-rb instead of Rails in our startup.I work for a startup. We are developing the most profitable mining pool with a smart profit-switching algorithm. The pool is written with Go as well as Ruby for internal services. We use microservice architecture and the apps are running within the containers. We a use TDD system even though our project is only a startup yet: weprefer to sleep less, but peacefully. The code quality is very important for us.