// readiness/unstable
        public IActionResult Unstable()
        {
            // This endpoint will change the return status from 200 to 500 every minute
            var minutesFromStart = Timekeeper.GetMinutesFromStart();

            if (minutesFromStart % 2 != 0)
            {
                _logger.LogInformation($"{minutesFromStart} min from the start -> response with 200");
                return(Ok("[lab-05 task #5] - ready"));
            }
            else
            {
                _logger.LogInformation($"{minutesFromStart} min from the start -> response with 500");
                return(StatusCode(500));
            }
        }