Readme updates

README.md

@@ -1,4 +1,22 @@
-loopback-explorer
+# loopback-explorer
-=================
 
-Browse and test your LoopBack app's APIs
+Browse and test your LoopBack app's APIs.
+
+## Basic Usage
+
+Below is a simple LoopBack application. The explorer is mounted at `/explorer`.
+
+```js
+var loopback = require('loopback');
+var app = loopback();
+var explorer = require('loopback-explorer');
+
+var Product = loopback.Model.extend('product');
+Product.attachTo(loopback.memory());
+app.model(Product);
+
+app.use(loopback.rest());
+app.use('/explorer', explorer(app));
+
+app.listen(3000);
+```