Add create-admin script to package.json and set up /api/users route in server.js for user management functionality.

routes/customers.js

@@ -0,0 +1,74 @@
+const express = require('express');
+const router = express.Router();
+const Customer = require('../models/Customer');
+
+// Get all customers
+router.get('/', async (req, res) => {
+  try {
+    const customers = await Customer.find().sort({ name: 1 });
+    res.json(customers);
+  } catch (error) {
+    console.error('Error fetching customers:', error);
+    res.status(500).json({ message: 'Server error' });
+  }
+});
+
+// Get single customer
+router.get('/:id', async (req, res) => {
+  try {
+    const customer = await Customer.findById(req.params.id);
+    if (!customer) {
+      return res.status(404).json({ message: 'Customer not found' });
+    }
+    res.json(customer);
+  } catch (error) {
+    console.error('Error fetching customer:', error);
+    res.status(500).json({ message: 'Server error' });
+  }
+});
+
+// Create customer
+router.post('/', async (req, res) => {
+  try {
+    const customer = new Customer(req.body);
+    await customer.save();
+    res.status(201).json(customer);
+  } catch (error) {
+    console.error('Error creating customer:', error);
+    res.status(500).json({ message: 'Server error' });
+  }
+});
+
+// Update customer
+router.put('/:id', async (req, res) => {
+  try {
+    const customer = await Customer.findByIdAndUpdate(
+      req.params.id,
+      { ...req.body, updatedAt: Date.now() },
+      { new: true }
+    );
+    if (!customer) {
+      return res.status(404).json({ message: 'Customer not found' });
+    }
+    res.json(customer);
+  } catch (error) {
+    console.error('Error updating customer:', error);
+    res.status(500).json({ message: 'Server error' });
+  }
+});
+
+// Delete customer
+router.delete('/:id', async (req, res) => {
+  try {
+    const customer = await Customer.findByIdAndDelete(req.params.id);
+    if (!customer) {
+      return res.status(404).json({ message: 'Customer not found' });
+    }
+    res.json({ message: 'Customer deleted successfully' });
+  } catch (error) {
+    console.error('Error deleting customer:', error);
+    res.status(500).json({ message: 'Server error' });
+  }
+});
+
+module.exports = router;