add notification badge with count

assets/styles/app.css

@@ -0,0 +1,14 @@
+body {
+    background-color: pink;
+}
+
+.notification .badge {
+    position: absolute;
+    top: -8px;
+    right: 5px;
+    padding: 5px 9px;
+    border-radius: 50%;
+    background-color: red;
+    color: white;
+    font-size: 6pt;
+}