update components

MainAppDMT/lib/screens/details/compenents/product_image.dart

+import 'package:flutter/material.dart';
+
+import '../../../constants.dart';
+
+class ProductPoster extends StatelessWidget {
+  const ProductPoster({
+    Key key,
+    @required this.size,
+    this.image,
+  }) : super(key: key);
+
+  final Size size;
+  final String image;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      margin: EdgeInsets.symmetric(vertical: kDefaultPadding),
+      // the height of this container is 80% of our width
+      height: size.width * 0.8,
+
+      child: Stack(
+        alignment: Alignment.bottomCenter,
+        children: <Widget>[
+          Container(
+            height: size.width * 0.7,
+            width: size.width * 0.7,
+            decoration: BoxDecoration(
+              color: Colors.white,
+              shape: BoxShape.circle,
+            ),
+          ),
+          Image.asset(
+            image,
+            height: size.width * 0.75,
+            width: size.width * 0.75,
+            fit: BoxFit.cover,
+          ),
+        ],
+      ),
+    );
+  }
+}