nairobi/config/environments/staging.rb

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # 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

  # Because autoloading is disabled in production environments with Rails 5,
  # using autoload_paths will not load needed classes from specified paths.
  # The solution to this, is to ask Rails to eager load classes.
  config.eager_load_paths += ["#{config.root}/lib"]

  # 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

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = Uglifier.new(harmony: true)
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = false

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_host = "http://assets.example.com"

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for Apache
  # config.action_dispatch.x_sendfile_header = "X-Accel-Redirect" # for NGINX

  # Mount Action Cable outside main process or domain.
  # config.action_cable.mount_path = nil
  # config.action_cable.url = "wss://example.com/cable"
  # config.action_cable.allowed_request_origins = [ "http://example.com", /http:\/\/example.*/ ]

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # Configure force_ssl in secrets.yml
  config.force_ssl = Rails.application.secrets.force_ssl

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  config.log_tags = [:request_id]

  # Use a different cache store in production.
  config.cache_store = :mem_cache_store

  # Use a real queuing backend for Active Job (and separate queues per environment).
  # config.active_job.queue_adapter     = :resque
  # config.active_job.queue_name_prefix = "consul_#{Rails.env}"
  config.action_mailer.perform_caching = false

  # Ignore bad email addresses and do not raise email delivery errors.
  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
  config.action_mailer.raise_delivery_errors = true
  config.action_mailer.default_url_options = { host: Rails.application.secrets.server_name }
  config.action_mailer.asset_host = "https://#{Rails.application.secrets.server_name}"

  # Configure your SMTP service credentials in secrets.yml
  if Rails.application.secrets.smtp_settings
    config.action_mailer.delivery_method = Rails.application.secrets.mailer_delivery_method || :smtp
    config.action_mailer.smtp_settings = Rails.application.secrets.smtp_settings
  end

  # Disable locale fallbacks for I18n
  # (prevents using fallback locales set in application.rb).
  # config.i18n.fallbacks = false

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter = ::Logger::Formatter.new

  # Use a different logger for distributed setups.
  # require "syslog/logger"
  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new "app-name")

  if ENV["RAILS_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger    = ActiveSupport::TaggedLogging.new(logger)
  end

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false

  # Inserts middleware to perform automatic connection switching.
  # The `database_selector` hash is used to pass options to the DatabaseSelector
  # middleware. The `delay` is used to determine how long to wait after a write
  # to send a subsequent read to the primary.
  #
  # The `database_resolver` class is used by the middleware to determine which
  # database is appropriate to use based on the time delay.
  #
  # The `database_resolver_context` class is used by the middleware to set
  # timestamps for the last write to the primary. The resolver uses the context
  # class timestamps to determine how long to wait before reading from the
  # replica.
  #
  # By default Rails will store a last write timestamp in the session. The
  # DatabaseSelector middleware is designed as such you can define your own
  # strategy for connection switching and pass that into the middleware through
  # these configuration options.
  # config.active_record.database_selector = { delay: 2.seconds }
  # config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
  # config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
end