Setup instructions are not clear for hosting server locally

## Description
As a developer, I need to setup the working environment, so that I can play with code and suggest some features/updates in the project

As of now, It is not clear in README.md file that how can we host the backend server as well as build the android app locally.

## Acceptance Criteria
### Update [Required]
- [x] Update Readme file
- [x] Also add relevant links to learn about project workflow.

## Definition of Done
- [x] All of the required items are completed.
- [x] Approval by 1 mentor.

## Estimation
1 hours