server.js

// server.js
require('dotenv').config(); // If using .env file for configuration
const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const bodyParser = require('body-parser');

const app = express();
const PORT = process.env.PORT || 5000; // Use environment variable or default to 5000

// Middleware to parse JSON bodies
app.use(bodyParser.json());
app.use(cors());

// MongoDB connection
mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/healthcare')
.then(() => console.log('MongoDB connected successfully'))
.catch(err => console.error('Failed to connect to MongoDB', err));

// Route handlers
const patientsRouter = require('./routes/patients');
const doctorsRouter = require('./routes/doctors');
const appointmentsRouter = require('./routes/appointments');

// Routes
app.use('/patients', patientsRouter);
app.use('/doctors', doctorsRouter);
app.use('/appointments', appointmentsRouter);

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