Migrating a web application to MongoDB

We already added MongoDB to our project using Docker Compose and npm commands, but we have not started using it yet. In this section, we will migrate a web application to MongoDB.

Installing dependencies

We will install the following dependencies:

npm install mongoose@7.4 dotenv@16

Managing the secrets

We will create a .env file with the following content:

MONGODB_URI=mongodb://localhost:27017/whispering-database
PORT=3000

Then, we will load the environment variables from the .env file with the following code into index.js:

import { app } from './server.js'
import mongoose from 'mongoose'
const port = process.env.PORT
try {
  await mongoose.connect(process.env.MONGODB_URI);
  console.log('Connected to MongoDB')
  app.listen(port, () => {
    console.log(`Running in http://localhost:${port}`)
  })
} catch (error) {
  console...