ajinkya-mhetre-mern/backend/src/config/database.js

A MERN starter with frontend and backend folders

// ===== src/config/database.js =====
const mongoose = require('mongoose');

const connectDB = async () => {
  try {
    const conn = await mongoose.connect(process.env.MONGODB_URI);
    console.log(`MongoDB Connected: ${conn.connection.host}`);
  } catch (error) {
    console.error('Database connection error:', error);
    process.exit(1);
  }
};

module.exports = connectDB;