Better Documentation (README.md)

[aitikgupta]

Currently, we fail to explain a lot of the functionality we've built over this sprint.

The current README.md needs a redesign:

• We show project structure (backend/ for FastAPI server, frontend/ for client code built with React components)
• We tell a bit about how DCT-DWT Transformations work (Probably not for a newcomer, but still needs to be addressed)
• We modularize the discussion into two parts, backend work (deployed on Heroku - http://sociomark-backend.herokuapp.com/) and frontend work (deployed on Netlify - https://sociomark.netlify.app/)
• GitHub Badges (For lints, Flake8 and ESLint, Prettier) - GitHub Actions are already present
• We explain the reproducing steps (the .env parts), and how to build on Windows (apparently doing this:
  javascript NODE_ENV=development npm run start
  doesn't work on Windows^)
• We tell a bit about the MongoDB backend (deployed on MongoDB Atlas)