Backend for a website

An online website built in angular.
Its going to be an gaming website. no need fr gaming implementation rather APIs for management.
for reference visit this site https://khelbro.com/
it needs following backend features:
1. Login using mobile number and OTP everytime
2. After successful login call API should send details of user
3. Create, Read, update, delete operation for games played

Thus it will have database creation as well APIs implementation
Please take reference of the above mentioned website for more details.