How to add title to Container in Flutter?

I want to add a title or image on the home page of the project, how can I do that? I need help. I want to add an image describing the application above the registration or login form.

 @override
  Widget build(BuildContext context) {
    SizeConfig().init(context);
    return Scaffold(
        appBar: AppBar(
        title: _title(),
    ),body: Container(
      height: double.infinity,
      width: double.infinity,
      padding: const EdgeInsets.all(10),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          _entryField('email', _controllerEmail),
          Padding(padding: EdgeInsets.only(bottom: 10)),
          _entryField('password', _controllerPassword),
          Padding(padding: EdgeInsets.only(bottom: 10)),
          _submitButton(),
          _loginOrRegisterButton(),
        ],
      ),
    ),
    );
  }
}