node express mongo boilerplate with jwt

1. Install Node.js and npm:

sudo apt update
sudo apt install nodejs
sudo apt install npm

1. Create a new Node.js project:

mkdir your_project_name
cd your_project_name
npm init -y

1. Install necessary packages:

npm install express mongoose jsonwebtoken body-parser

1. Set up Express server in app.js:

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');

const app = express();
const PORT = process.env.PORT || 3000;

app.use(bodyParser.json());

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});

1. Configure MongoDB connection in app.js:

mongoose.connect('mongodb://localhost/your_database_name', {
  useNewUrlParser: true,
  useUnifiedTopology: true
});

1. Create a model for user in models/User.js:

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const userSchema = new Schema({
  username: String,
  password: String
});

module.exports = mongoose.model('User', userSchema);

1. Create routes for authentication in routes/auth.js:

const express = require('express');
const router = express.Router();
const User = require('../models/User');
const jwt = require('jsonwebtoken');

router.post('/login', async (req, res) => {
  // Authentication logic here
});

router.post('/register', async (req, res) => {
  // Registration logic here
});

module.exports = router;

1. Implement JWT token generation and verification in routes/auth.js:

const generateToken = (user) => {
  return jwt.sign({ _id: user._id }, 'your_secret_key', { expiresIn: '1h' });
};

const verifyToken = (req, res, next) => {
  // Token verification logic here
};

// Use generateToken and verifyToken in the login and register routes

1. Integrate the authentication routes in app.js:

const authRoutes = require('./routes/auth');
app.use('/auth', authRoutes);

1. Update the login and register routes with JWT token:

// Inside routes/auth.js

router.post('/login', async (req, res) => {
  // Authenticate user and generate JWT token
  const token = generateToken(user);
  res.json({ token });
});

router.post('/register', async (req, res) => {
  // Create user and generate JWT token
  const token = generateToken(newUser);
  res.json({ token });
});

Now, you have a basic Node.js, Express, and MongoDB boilerplate with JWT authentication. Customize the authentication logic as needed for your application.