Run multiple Rails apps with Puma-dev

Before joining 37signals I hadn't encountered Puma-dev. This post is a message to past-me who would have benefited from using it to develop a constellation of Ruby on Rails applications.A pretty typical setup for an organisation with a Ruby on Rails monolith is to at some point start breaking it up. Examples of Rails apps that may be extracted out:A specialised search or newsfeed APIAuthentication servicesAdmin UIMicroservicesWorking on a system like this locally requires that the developer coordinates running multiple Rails servers:.