Added new already built-in endpoint so tester can use it straight away
/delay/200 will return response code 200 after 200 millisecond
/delay/4000 will return response code 200 after 4000 millisecond
/delay/4000/6000 will return response code 200 after delay between 4000 to 6000 millisecond
/code/200 will immediately return response code 200
/code/200/2000 will immediately return response code 200 after 2000 millisecond
/code/404/2000/5000 will immediately return response code 404 after delay between 2000 to 5000 millisecond