fix: updated instruction for local setup in mac OS

[Subhash703]

Problem

I faced some problems while setting up the project in my Mac OS.

Solution

Have added instructions which I followed to make it work

Environment variable changes

Added extra instruction to update .env file

Pre-deployment activity

Things needed to be done before deploying this change (if any)

Post-deployment activity

Things needed to be done after deploying this change (if any)

API changes

Endpoint	Method	Request body	Response Body
API	GET/POST, etc	request	response

Possible Issues in the future

More instructions can be added in future if needed.