1. Node.js
2. Express
3. MongoDB

# with npm

npm install

npm install dotenv --save-dev

Add the following code the server.js file.

require('dotenv').config()

Create a .env file in the root directory of project. Add environment variables specified below.

MONGO_PASS= mongodb-password
CRYPTO_PASSWORD=crypto-password
CRYPTO_SALT=salt-used-in-cyrpto
JWT_SECRETKEY=jwt-secret-key
NODEMAILER_EMAILID=your-mail-id
NODEMAILER_PASSWORD=your-mail-password

PORT=3000
DEV=1

Replace the MONGO_URL with 'mongodb://localhost:27017'

const MONGO_URL = 'mongodb://localhost:27017';

The given url in the code is of MongoDB Atlas cloud database.
Follow the link create an Atlas Account-

• MongoDBAtlas - Getting Started with MongoDB Atlas