ch5: Endpoints are not exposed by the Image.

In Reference to Ch5,

Image: `istioinaction/catalog:latest` is Possibly not exposing given endpoint. 

On: `curl http://localhost/api/users -H "Host: catalog.istioinaction.io"`

I'm getting 404:
```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot GET /api/users</pre>
</body>
</html>
```
