feat(backend): Added boilerplate

[priyanshu20]

Description

Added flask boilerplate using flask-restful and flask-cors

closes #3

Type of change

• [x] New feature (non-breaking change which adds functionality)

Checklist:

• [x] My code follows the style guidelines(Clean Code) of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have created a helpful and easy to understand README.md
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests/screenshots(if any) that prove my fix is effective or that my feature works

[priyanshu20]

@HarshCasper Please review.

[HarshCasper]

@priyanshu20 : There is a new Issue open for adding authentication routes for the Flask Application. Let me know there if you are interested :)