create-mvc-backend-app/src/app.js

A complete backend API template following MVC architecture with Node.js, Express.js, MongoDB, and JWT authentication

import 'dotenv/config';
import express from 'express';
import cors from 'cors';
import cookieParser from 'cookie-parser';
import authRouter from './routes/auth.routes.js';

const app = express();

// Middleware
app.use(cors({
    origin: process.env.FRONTEND_URL || 'http://localhost:3000',
    credentials: true
}));
app.use(express.json());
app.use(cookieParser());

// Routes
app.use('/api/auth', authRouter);

// Health check route
app.get('/api/health', (req, res) => {
    res.status(200).json({
        success: true,
        message: "Server is running",
        timestamp: new Date().toISOString()
    });
});
app.get('/', (req, res) => {
    res.status(200).json({
        success: true,
        message: "Server is running",
        timestamp: new Date().toISOString()
    });
});

// Error handling
app.use((err, req, res, next) => {
    console.error('Error:', err.message);
    res.status(500).json({
        success: false,
        message: 'Internal server error'
    });
});

// 404 handler
app.use('*', (req, res) => {
    res.status(404).json({
        success: false,
        message: 'Route not found'
    });
});

export default app;