Center Container Flutter

center_container.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: true,
      home: Scaffold(
        body: Center(
          child: Container(
            constraints: BoxConstraints(minWidth: 100, maxWidth: 600),
            child: Column(
              children: [
                Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Flexible(
                      child: Text(
                          "This is Very Long Title, This is Very Long Title, This is Very Long Title"),
                    ),
                    FittedBox(
                      child: Text(
                        "Right Side",
                      ),
                    ),
                  ],
                ),
                Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Flexible(
                      child: Text(
                          "This is Very Long Title, This is Very Long Title, This is Very Long Title"),
                    ),
                    FittedBox(
                      child: Text(
                        "Right Side",
                      ),
                    ),
                  ],
                ),
                Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Flexible(
                      child: Text(
                          "This is Very Long Title, This is Very Long Title, This is Very Long Title"),
                    ),
                    FittedBox(
                      child: Text(
                        "Right Side",
                      ),
                    ),
                  ],
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}