Column设置一个backgroundImage, 怎么可以做到图片多大, Column就多大, 试了auto不行, 100%不符合需求

@Entry  
@Component  
export struct demo {  
  
  build() {  
    Column() {  
      Column() {  
        Stack() {  
          Image($r('app.media.preview'))  
            .fitOriginalSize(true)  
          this.getBuilder()  
        }.align(Alignment.Top)  
      }  
  
    }.width('100%')  
  
  }  
  
  @Builder  
  getBuilder() {  
    Column() {  
      Text('01:58')  
        .fontSize(16)  
        .fontWeight(FontWeight.Bold)  
  
      Text('sign-in')  
        .fontColor(Color.White)  
        .fontSize(12)  
        .height(24)  
        .alignSelf(ItemAlign.Center)  
        .padding({  
          left: 16,  
          right: 16  
        })  
        .borderRadius(12)  
    }  
  }  
}