Add XS shadow to top nav header to act as a slight border

packages/server/src/utilities/appDirectoryTemplate/pages/main/page.json

@@ -19,7 +19,8 @@
             "justify-content": "flex-start",
             "align-items": "flex-start",
             "background": "#fff",
-            "width": "100%"
+            "width": "100%",
+            "box-shadow": "0 1px 2px 0 rgba(0, 0, 0, 0.05)"
           },
           "hover": {},
           "active": {},