Steps:
==>If you haven't install node js install it from here https://nodejs.org/dist/v6.10.3/node-v6.10.3-x64.msi
==> Dont forget to add path of your node folder in program file to environment variable for globally accessing from cmd. Info - https://www.nextofwindows.com/how-to-addedit-environment-variables-in-windows-7
==> Clone it or download the zip file
==> Extract it and inside the folder containing package.json file run cmd and run npm install
==> Configure your sql database in sqldb.js file
==> In cmd run node app.js It must show server started
==> Open any browser and goto address localhost:3000