How to place maxlines 0/500 inside a border of textFiled and to left in Flutter?

Question

class TextFieldWidget extends StatelessWidget {
  const TextFieldWidget({
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return TextField(
      minLines: 6,
      keyboardType: TextInputType.multiline,
      maxLines: null,
      maxLength: 500,
      decoration: InputDecoration(
        hintText: 'Write a description about your property',
        fillColor: Colors.white,
        border: OutlineInputBorder(
          borderSide: const BorderSide(color: Colors.black54, width: 1.0),
          borderRadius: BorderRadius.circular(25.0),
        ),
        focusedBorder: OutlineInputBorder(
          borderSide: const BorderSide(color: Colors.black54, width: 1.0),
          borderRadius: BorderRadius.circular(25.0),
        ),
      ),
    );
  }
}

I want to place the text 0/500 inside of a border of textfield and to the left. How to do that? I have attached an image.

Desired output

Currently it looks like this