pmdi/backend/server.js

const express = require('express');
const mongoose = require('mongoose');
const dotenv = require('dotenv');
const authRoutes = require('./routes/auth');
const invoiceRoutes = require('./routes/invoices');

dotenv.config();

const app = express();
app.use(express.json());

mongoose.connect(process.env.MONGO_URI, {
  useNewUrlParser: true,
  useUnifiedTopology: true
}).then(() => console.log('Connected to MongoDB')).catch(err => console.error(err));

app.use('/auth', authRoutes);
app.use('/invoices', invoiceRoutes);

app.use((err, req, res, next) => {
  console.error(err.stack);
  res.status(500).json({ error: 'Something went wrong!' });
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));