code: public static void main(String[] args) {
      LOGGER.info("Starting the application! Current time: {}", System.currentTimeMillis());
  
      MDC.put("my_custom_key", "custom_value");
  
      execute();
  
      LOGGER.info("Finishing the application! Current time: {}", System.currentTimeMillis());
    }
docs: Main method.
  @param args the args.