updated the default example for repl

Author: ajaymathur

docs/01-getting-started.md

@@ -1 +1,3 @@
-# Hello world
+# Getting Started
+
+

website/src/pages/repl/index.js

@@ -8,8 +8,8 @@ import * as uriUtils from './utils/uriUtils';
 
 const STARTING_CODE = {
   code: `type ButtonPropType = {
-    /* This is*/
-  label: string
+    /* Handler to be called on click of the button*/
+  onClick: () => void
 }
 class Button extends React.Component<ButtonPropType>{
 }`,