basic-rails/app/controllers/main_controller.rb

class MainController < ApplicationController
  def home
    logger.info "efficient logging for dark theme"
  end

  def about
    logger.debug "some debugging info"

    logger.info "relevant information"
    logger.info "multiline\nline2\nline3"

    logger.warn "a warning"
    # logger.error "an error"

    # raise "this is an error"
    # sleep 3
  end
end