Fix puma example on_boot notify ready.

Author: ioquatix

examples/puma/application.rb

@@ -13,7 +13,7 @@ def setup(container)
 			# instance.exec("bundle", "exec", "puma", "-C", "puma.rb", ready: false)
 
 			# Manage a child process of puma / puma workers:
-			pid = ::Process.spawn("puma")
+			pid = ::Process.spawn("puma", "-C", "puma.rb")
 
 			instance.ready!
 

examples/puma/puma.rb

@@ -2,5 +2,5 @@
 	require "async/container/notify"
 
 	notify = Async::Container::Notify.open!
-	notify.ready!
+	notify&.ready!
 end

lib/async/container/notify/console.rb

@@ -5,7 +5,7 @@
 
 require_relative "client"
 
-require "console/logger"
+require "console"
 
 module Async
 	module Container