database.js

const mongoose = require('mongoose');

const mongoURI = process.env.MONGODB_URI;
mongoose.connect(mongoURI, { useNewUrlParser: true, useUnifiedTopology: true });

const db = mongoose.connection;

db.on('error', (error) => {
    console.error('MongoDB connection error:', error);
});

db.once('open', function() {
    console.log('MongoDB connected successfully!');
});

module.exports = db;