Added comments to help users get started.

BlazingCoffee/Client/wwwroot/index.html

@@ -7,7 +7,16 @@
     <title>Blazing Coffee</title>
     <base href="/" />
     <link href="https://fonts.googleapis.com/css2?family=Roboto&display=swap" rel="stylesheet">
+    <!-- Trial script file -->
+    <!-- If you are using a trial license, replace the telerik-blazor.js script tag with the one commented below. -->
+    <!--
+        <script src="_content/telerik.ui.for.blazor.trial/js/telerik-blazor.js"></script>
+    -->
+    <!-- /Trial script file -->
+    <!-- Commercial script file -->
     <script src="_content/telerik.ui.for.blazor/js/telerik-blazor.js"></script>
+    <!-- /Commercial script file -->
+    <!-- If main.css is missing, please `run npm install` and `dotnet build`  -->
     <link id="theme" href="css/main.css" rel="stylesheet" />
     <!-- PWA -->
     <link href="manifest.json" rel="manifest" />