Environment Setup Documentation

[shady-robot]

1. Adding Environment setup guide for frontend/backend codebase. (may in separated doc files)

• pre-commit install

2. Update project primary README.md file screenshot
3. Primary technical stack for project setup in README.md
4. Provide Demo site with specific user account may be needed too.

[shady-robot]

Mainly idea here is to help visitor better understanding the project layout and easy setup.
Knowing how it is looks like and how it work abstractly(basic project structure). @Octobug