Update README.md to include live-server and switch mocha to npm test

Changes to ensure new test suite runs as expected, fix CORS error due to using module imports/exports by using live-server instead of just opening the file in browser

README.md

@@ -21,9 +21,10 @@ Use this gif as an example of how the app should work.
 
 - Run `npm install` to install the dependencies.
 - Run `json-server --watch db.json` to get the backend started
-- Open the `index.html` file on your browser
+- Run `npm install -g live-server` to install live-server globally
+- Run `live-server` to start the frontend in browser
 - Write your code in the `index.js` file
-- As you are writing your code out and completing the deliverables ensure that it works on the DOM and passes the tests by running `mocha` in a new terminal in the same directory
+- As you are writing your code out and completing the deliverables ensure that it works on the DOM and passes the tests by running `npm test` in a new terminal in the same directory
 
 ## Endpoints