Backend added to the frontend module of blockchain explorer

-------------------------------- Front End Instructions --------------------------------

cd ui

npm install

npm start

This project was bootstrapped with [Create React App]

npm start

Runs the app in the development mode.
Open [http://localhost:3000] to view it in your browser.

The page will reload when you make changes.
You may also see any lint errors in the console.

------------------------------ Back End Instructions ----------------------------------

cd backend

npm install

node server.js

Server is running on port : 4000

Open [http://localhost:4000/json] to view it in your browser.

All data is dynamic and fetch from mongo db directly.