Revamping the backend

[pulkitvyas08]

The current flask backend presents a lot of problems including poor session management (although I've seen a few good examples of the combination of flask-session and Redis, so if you can devise some way of solving the below-mentioned problems then feel free to reply to this).
The major problem that we have is in storing the responses of students periodically such that if their internet goes down or something then they can continue from right where they left (this was discussed here: ChiragSaxena5437#31)
So unless there is a solution for this with flask, we want to change the backend to Django/Node