Align Text in custom created Shape : Flutter - flutter

Question

I have created one Custom shape in Flutter. The issue I am facing is, I have used ShapeBorder and assigned it Card. I want to align my text inside the drawn widget but currently it's also considering oursider view as a part of a widget.
Here is the code I have used:
Align(
child: Container(
height: 250,
width: 300,
child: Card(
clipBehavior: Clip.hardEdge,
shape: Shape1(factor: 0.8),
child: Container(
padding: EdgeInsets.only(left: 16.0),
child: Align(
alignment: Alignment.bottomLeft,
child: Text(
'Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book',
// style: textStyleNotoSansRegular(),
),
),
),
),
),
widthFactor: 0.8,
),
Shape Class:
class Shape1 extends ShapeBorder {
final double factor;
Shape1({this.factor});
#override
EdgeInsetsGeometry get dimensions => EdgeInsets.zero;
#override
Path getInnerPath(Rect rect, {TextDirection textDirection}) => null;
#override
Path getOuterPath(Rect rect, {TextDirection textDirection}) {
return Path()
..moveTo(rect.bottomLeft.dx, rect.bottomLeft.dy)
..relativeLineTo(rect.width * factor, 0)
..lineTo(rect.topRight.dx, rect.topRight.dy)
..relativeLineTo(rect.width * -factor, 0)
..close();
}
#override
void paint(Canvas canvas, Rect rect, {TextDirection textDirection}) {
var path = Path()
..moveTo(rect.bottomLeft.dx, rect.bottomLeft.dy)
..relativeLineTo(rect.width * factor, 0)
..lineTo(rect.topRight.dx, rect.topRight.dy)
..relativeLineTo(rect.width * -factor, 0)
..close();
var boxPainter = Paint();
boxPainter.strokeWidth = 5;
boxPainter.color = Colors.yellow;
boxPainter.style = PaintingStyle.stroke;
canvas.drawPath(path, boxPainter);
}
#override
ShapeBorder scale(double t) => null;
}
Current Result:
Expected Result: