Improvement of setup docs in readme.md

In the readme.md file, the setup docs is as follows :

**Setup locally**
- Firstly download and install rabbitmq-server on your system. [See here](https://www.rabbitmq.com/download.html)
- Create .env
- Make sure rabbitmq-server is running (default port 5672)

**Start server.**
- npm start
- For testing.
- npm test

Which for me are a little vague!

- It is said, to create .env file, but what should be the configuration and should we include anything?
- I tried copying the .env.sample file but it didn't work. While running the server it is giving errors
- Steps to clone the repo and npm i is also not mentioned in the docs.

Errors :

Solution :

- There should be a detailed explaination of methods to setup the enviornment locally