challenge-11/models/Customer.js

const mongoose = require('mongoose');

const customerSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true
  },
  email: {
    type: String,
    required: true,
    unique: true
  },
  phone: {
    type: String
  },
  carDetails: {
    make: String,
    model: String,
    year: Number,
    modifications: [String]
  },
  createdAt: {
    type: Date,
    default: Date.now
  },
  updatedAt: {
    type: Date,
    default: Date.now
  }
});

module.exports = mongoose.model('Customer', customerSchema);