Many Ruby developers use Rack, but don't interact with it or know how it works. We'll look at how we all use it and the middleware available for rack-based applications.
Shoryuken allows your Ruby on Rails application to easily integrate with AWS Simple Queueing Service (SQS) for background job processing using ActiveJob. We'll learn about how to get it setup, and how this makes it convenient to interact with other (ruby or not) services.
When creating migrations, it is easy to create a migration that will run smoothly in production but cause downtime when running in production. The zero_downtime_migrations gem minimizes the risk of this happening.
