[ruby/hanami] Auto config workers (TechEmpower#10085)

Let Puma select the number of workers.

Author: p8

frameworks/Ruby/hanami/config/auto_tune.rb

@@ -1,10 +1,4 @@
 # frozen_string_literal: true
-require_relative 'auto_tune'
-
-# FWBM only... use the puma_auto_tune gem in production!
-num_workers, num_threads = auto_tune
-
-workers num_workers
 threads 3, 3
 
 port        ENV.fetch("HANAMI_PORT", 2300)

frameworks/Ruby/hanami/config/puma.rb

@@ -1,6 +1,7 @@
 FROM ruby:3.4
 
 ENV RUBY_YJIT_ENABLE=1
+ENV WEB_CONCURRENCY=auto
 
 # Use Jemalloc
 RUN apt-get update && \