[BACKEND/FEATURE REQUEST] Moving the backend from flask to Django.

The project currently stands on Python + Flask tech stack. Now it's time to move the tech stack to Python + Django.

The file mainScanner.py renders the output of the working code in frontend through flask. Replace this file to a new file which works for the current scanning processes and renders the output through Django.

Relevant links for this update: Django , develop branch, feature/python2.7 branch, feature/python3.8 branch, master branch.

Checkout feature/python2.7 and feature/python3.8 branches for the corresponding python versions of the project. NOTE: The master branch is maintained for python2.