```ruby
workers ENV.fetch('PUMA_WORKERS', `nproc`).to_i

max_threads = ENV.fetch('PUMA_MAX_THREADS', 16).to_i
min_threads = ENV.fetch('PUMA_MIN_THREADS', max_threads).to_i
threads min_threads, max_threads

environment ENV.fetch('RAILS_ENV', 'production')

bind 'unix:///tmp/run.sock'
preload_app!

# Don't wait for workers to finish their work. We might have long-running HTTP requests.
# But docker gives us only 10 seconds to gracefully handle our shutdown process.
# This settings tries to shut down all threads after 2 seconds. Puma then gives each thread
# an additional 5 seconds to finish the work. This adds up to 7 seconds which is still below
# docker's maximum of 10 seconds.
# This setting only works on Puma >= 3.4.0.
force_shutdown_after 2 if respond_to?(:force_shutdown_after)

on_worker_boot do
  ActiveRecord::Base.establish_connection
end

before_fork do
  ActiveRecord::Base.connection_pool.disconnect!
end
```

Use platform independent way to get CPU count
user
```ruby
workers ENV.fetch('PUMA_WORKERS', Etc.nprocessors).to_i

max_threads = ENV.fetch('PUMA_MAX_THREADS', 16).to_i
min_threads = ENV.fetch('PUMA_MIN_THREADS', max_threads).to_i
threads min_threads, max_threads

environment ENV.fetch('RAILS_ENV', 'production')

bind 'unix:///tmp/run.sock'
preload_app!

# Don't wait for workers to finish their work. We might have long-running HTTP requests.
# But docker gives us only 10 seconds to gracefully handle our shutdown process.
# This settings tries to shut down all threads after 2 seconds. Puma then gives each thread
# an additional 5 seconds to finish the work. This adds up to 7 seconds which is still below
# docker's maximum of 10 seconds.
# This setting only works on Puma >= 3.4.0.
force_shutdown_after 2 if respond_to?(:force_shutdown_after)

on_worker_boot do
  ActiveRecord::Base.establish_connection
end

before_fork do
  ActiveRecord::Base.connection_pool.disconnect!
end
```
assistant