config/puma.rb
workers Integer(ENV.fetch("WEB_CONCURRENCY", 2))
threads_count = Integer(ENV.fetch("MAX_THREADS", 2))
threads(threads_count, threads_count)
preload_app!
rackup DefaultRackup
environment ENV.fetch("RACK_ENV", "development")
on_worker_boot do
ActiveRecord::Base.establish_connection
end