Maybe/config/initializers/sentry.rb

if ENV["SENTRY_DSN"].present?
  Sentry.init do |config|
    config.dsn = ENV["SENTRY_DSN"]
    config.environment = ENV["RAILS_ENV"]
    config.breadcrumbs_logger = [ :active_support_logger, :http_logger ]
    config.enabled_environments = %w[production]

    # Set traces_sample_rate to 1.0 to capture 100%
    # of transactions for performance monitoring.
    # We recommend adjusting this value in production.
    config.traces_sample_rate = 0.5

    # Set profiles_sample_rate to profile 100%
    # of sampled transactions.
    # We recommend adjusting this value in production.
    config.profiles_sample_rate = 0.5
  end
end