--update: CI setup guide & yml files

Author: ashokdey

.coveralls.yml

@@ -0,0 +1,2 @@
+service_name: travis
+repo_token: P1M53gwEDbai0gQZeyCtaMWHF7Hk6i8NS

.travis.yml

@@ -4,4 +4,4 @@ node_js:
 after_success:
   - npm install -D coveralls
   - npm run coverage
-  # - npm run coveralls
+  - npm run coveralls

README.md

@@ -3,7 +3,7 @@
 The repo for the code lab session of JSLovers meet-up on 17th March 2019! :blush:
 The repository contains both the tests using ~~`Mocha`~~<sup>\*</sup> and `Jest`, however I prefer Node.js testing using `Mocha` when it comes to `MongoDB` & `Mongoose`
 
-[![Build Status](https://travis-ci.org/ashokdey/nodejs-unit-testing.svg?branch=master)](https://travis-ci.org/ashokdey/nodejs-unit-testing)
+[![Build Status](https://travis-ci.org/ashokdey/nodejs-unit-testing.svg?branch=step-4-ci-cd)](https://travis-ci.org/ashokdey/nodejs-unit-testing) [![Coverage Status](https://coveralls.io/repos/github/ashokdey/nodejs-unit-testing/badge.svg?branch=master)](https://coveralls.io/github/ashokdey/nodejs-unit-testing?branch=master)
 
 ## Agenda
 

Setup-TravisCI.md renamed to Setup-For-CI.md

@@ -4,17 +4,19 @@ Let's get this repository set for TravisCI so that TravisCI can run the unit/int
 
 ## Steps
 
+### Setup CI using TravisCI
+
 - Create an account on [TravisCI.org](https://travis-ci.org)
 - Add your GitHub project repository from TravisCI Dashboard
 - In your local repo for the same project, add a new file, `.travis.yml` at the root of the project folder
   - Add the langauge for your project
   - You can also add the version of your language
   - You can also add `after success` tasks (What to so after all the tests are successful)
     - Like we want the code coverage report once all test cases are passed
+- Let's get the Badge 😍 (Don't forgot to choose the branch while checking for the badge)
 - Push the changes to GitHub
-- Let's get the Badge 😍
 
-## Example `.travis.yml` file
+#### Example `.travis.yml` file
 
 ```yml
 language: node_js
@@ -25,3 +27,20 @@ after_success:
   - npm run coverage
   - npm run coveralls
 ```
+
+### Setup Coveralls for Code Coverage Badge
+
+- Go to [Coveralls.io](https://coveralls.io/)
+- Add your GitHub project repo
+- Click on `Details`, you'll get your repo token
+- Scroll down further to get the Code Coverage Badge
+- Choose markdown and paste the code in `README.md` 😍
+- In your local project repo, create a `.coveralls.yml`
+- Push the changes to GitHub
+
+#### Example `.coveralls.yml` file
+
+```yml
+service_name: travis
+repo_token: your_token
+```