1. firestore 버전 업 (pubspec.yaml) # Add the dependency for the Firebase Core Flutter SDKfirebase_core: ^1.2.1cloud_firestore: ^2.2.1 2. main.dart 에서 Firebase.initializeApp(); import 'package:flutter/material.dart';import 'package:flutter_netflix_clone/screen/home_screen.dart';import 'package:flutter_netflix_clone/screen/more_screen.dart';import 'package:flutter_netflix_clone/widget/bottom_bar.dart';import 'package:firebase_core/firebase_core.dart';void main() { runApp(MyApp());}class MyApp extends StatefulWidget { _MyAppState createState() => _MyAppState();}class _MyAppState extends State<MyApp> { late TabController controller; @override Widget build(BuildContext context) { Firebase.initializeApp(); 3. home screnn에서  class _HomeScreenState extends State<HomeScreen> { FirebaseFirestore firestore = FirebaseFirestore.instance; 4. model_movie.dart 에서 class Movie { final String title; final String keyword; final String poster; final bool like; final DocumentReference reference; Movie.fromMap(Map<String, dynamic> map, {required this.reference}) : title = map['title'], keyword = map['keyword'], poster = map['poster'], like = map['like']; Movie.fromSnapShot(DocumentSnapshot snapshot) : this.fromMap(snapshot.data() as Map<String, dynamic>, reference: snapshot.reference); 5. build.gradle 설정