gradient container flutter
decoration: BoxDecoration( gradient: LinearGradient( colors: [ const Color(0xFF3366FF), const Color(0xFF00CCFF), ], begin: const FractionalOffset(0.0, 0.0), end: const FractionalOffset(1.0, 0.0), stops: [0.0, 1.0], tileMode: TileMode.clamp, ), ),