register

# File actionpack/lib/action_dispatch/system_testing/server.rb, line 18
        def register
          Capybara.register_server :rails_puma do |app, port, host|
            Rack::Handler::Puma.run(
              app,
              Port: port,
              Threads: "0:1",
              workers: 0,
              daemon: false,
              Silent: self.class.silence_puma
            )
          end
        end