text: const mongoose = require('mongoose');
  
  const bookSchema = new mongoose.Schema({
  title: {type: String, required:true},
  author: {type: String},
  releaseDate: {type: Date, required:true},
  imageUrl: {type: String, required: true}
  });
  
  mongoose.model('Book', bookSchema);
  
  module.exports = mongoose.model('Book');