I wanted to draw a dynamic height line, as shown in the given picture below

I did something line this using a continer with one sided border
Container(
child:(content goes here....)
margin: EdgeInsets.symmetric(horizontal:16+20.0),
decoration: BoxDecoration(
border: Border(
left: BorderSide(width: 2.0, color: Colors.lightBlue.shade600),
),
color: Colors.white,
),
)
but the issue is the corners(top and below) of the line is not rounded.
I want to draw a vertical line on the left side of my post, and on the right side goes the content.
