I am currently working on flutter. I am using stack for stack 2 widgets. But i have some problems.

This is what I am trying to do.

But my widgets look like this.

That's my code:

class UpcomingSessionItem extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Stack(
      clipBehavior: Clip.none,
      alignment: AlignmentDirectional.bottomCenter,
      children: [
        ClipRRect(
            borderRadius: BorderRadius.circular(25),
            child: Image.asset('assets/images/yoga-1.jpg')),
        Container(
          height: 100,
          padding: EdgeInsets.all(20),
          color: Colors.white,
          child: Column(
            children: [
              Row(
                children: [
                  Column(
                    children: [
                      Text(
                        "9 am - 10:30 am",
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Text("Yoga for Beginners with Emily Cassel")
                    ],
                  )
                ],
              )
            ],
          ),
        ),
      ],
    );
  }
}