hwo to give shadow to container in flutter code example

Example 1: flutter add shadow to container

Container(
  decoration: BoxDecoration(
    boxShadow: [
      BoxShadow(
        color: Colors.grey.withOpacity(0.8),
        spreadRadius: 10,
        blurRadius: 5,
        offset: Offset(0, 7), // changes position of shadow
      ),
    ],
  ),
  child: Image.asset(chocolateImage),
)

Example 2: flutter shadow container

Card(
            elevation: 8,
            child: Container(width: 100, height: 100, color: Colors.blue),
          ),