如何将符合Material Design的填充应用到我的Flutter Scaffold？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        // 在这里添加填充
        body: Container(
          // 添加填充样式
          padding: EdgeInsets.all(16.0),
          child: Center(
            child: Text('Hello, World!'),
          ),
        ),
      ),
    );
  }
}

Container(
  padding: EdgeInsets.all(16.0),
  decoration: BoxDecoration(
    color: Colors.blue, // 填充的背景颜色
    borderRadius: BorderRadius.circular(8.0), // 填充的圆角
  ),
  child: Center(
    child: Text('Hello, World!', style: TextStyle(color: Colors.white)),
  ),
),