API end points
'/' -> it will render the index.html file which will show the questains '/quiz' -> it will fetch the all questains from backend '/quiz/answer/:id' -> method post it will take the qustain number and the option what the user click store in the userAns object like {questain:option} '/quiz/submit' -> it will fetch the questains array and answars and userAns array and show details to user