reduce duplicated code

lib/utils/style.dart

@@ -41,3 +41,15 @@ BoxDecoration containerDecoration = BoxDecoration(
     ],
     color: ColorsManager.boxColor,
     borderRadius: const BorderRadius.all(Radius.circular(10)));
+
+BoxDecoration subSectionContainerDecoration = BoxDecoration(
+  color: ColorsManager.whiteColors,
+  boxShadow: [
+    BoxShadow(
+      color: Colors.black.withOpacity(0.1),
+      blurRadius: 10,
+      spreadRadius: 1,
+      offset: const Offset(0, 2),
+    ),
+  ],
+);