feat:backend added

[RohithChittibommala]

#5 #4 #3

1. build routes
2. implemented hashing of passwords
3. deployed on Heroku
4. updated read me file

[RohithChittibommala]

@iiitv/project-maintainers please review my pull request
the app is deployed at https://club-collab.herokuapp.com/

sample one for signup

     {
        "name":"vadodara",
        "email":"[email protected]",
        "password":"rybaopd"
     }