From https://once.com/writebook

config/environments/production.rb

@@ -0,0 +1,69 @@
+require "active_support/core_ext/integer/time"
+require "active_support/core_ext/numeric/bytes"
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # Code is not reloaded between requests.
+  config.enable_reloading = false
+
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both threaded web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
+  # Full error reports are disabled and caching is turned on.
+  config.consider_all_requests_local       = false
+  config.action_controller.perform_caching = true
+
+  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  # config.require_master_key = true
+
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.asset_host = "http://assets.example.com"
+
+  # Store uploaded files on the local file system (see config/storage.yml for options).
+  config.active_storage.service = :local
+
+  # Log to STDOUT by default
+  config.logger = ActiveSupport::Logger.new(STDOUT)
+    .tap  { |logger| logger.formatter = ::Logger::Formatter.new }
+    .then { |logger| ActiveSupport::TaggedLogging.new(logger) }
+
+  # Prepend all log lines with the following tags.
+  config.log_tags = [ :request_id ]
+
+  # Info include generic and useful information about system operation, but avoids logging too much
+  # information to avoid inadvertent exposure of personally identifiable information (PII). Use "debug"
+  # for everything.
+  config.log_level = ENV.fetch("RAILS_LOG_LEVEL", "info")
+
+  # Cache in memory for now
+  config.cache_store = :redis_cache_store
+
+  # Assets are cacheable
+  config.public_file_server.headers = {
+    "Cache-Control" => "public, max-age=#{1.year.to_i}"
+  }
+
+  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
+  # the I18n.default_locale when a translation cannot be found).
+  config.i18n.fallbacks = true
+
+  # Always be SSL'ing (unless told not to)
+  config.assume_ssl = ENV["DISABLE_SSL"].blank?
+  config.force_ssl  = ENV["DISABLE_SSL"].blank?
+
+  # Don't log any deprecations.
+  config.active_support.report_deprecations = false
+
+  # Do not dump schema after migrations.
+  config.active_record.dump_schema_after_migration = false
+
+  # SQLite is good, actually
+  config.active_record.sqlite3_production_warning = false
+
+  config.active_job.queue_adapter = :resque
+end