Adding Border to Icons flutter

I want to add border to the icons in flutter like in the image below.

How can I achieve that?

Solution 1: Ulaş Kasım

I tried something creative

Stack(
  children: [
     _buildIcon(48, Colors.blue),
     _buildIcon(44, Colors.white),
  ],
),

Widget _buildIcon(double size, Color color) {
  return Container(
    height: 48,
    width: 48,
    alignment: Alignment.center,
    child: Icon(
      Icons.star,
      color: color,
      size: size,
    ),
  );
}