Draft of new codelab for review

src/site/docs/tutorials/cmdline/index.markdown

 ---
 layout: tutorial
 title: "Write Command-Line Apps"
 description: "Basics for command-line apps"
 has-permalinks: true
 tutorial:
   id: dart-io
 next: /
 next-title: "Home"
 prev: indexeddb/
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 Refer to the API docs for <a href="https://api.dartlang.org/dart_io.html" target="_blank">dart:io</a>,
 <a href="https://api.dartlang.org/dart_async.html" target="_blank">dart:async</a>,
 <a href="https://api.dartlang.org/dart_convert.html" target="_blank">dart:convert</a>,
 and the
 <a href="https://api.dartlang.org/dart_args.html" target="_blank">args</a>
 package for more classes, functions, and properties.
 
 ## What next? {#what-next}
 
+Try the [Weigh Anchor: Deploy a Server and App](/codelabs/deploy/) code lab
+to learn how to deploy your project to the Heroku hosting service.
+
 The [Get Input from a Form](/docs/tutorials/forms/) tutorial
 features a client-server.
 The code for the server, which uses CORS headers and handles
 POST requests, is explained in detail.
 
 {% endcapture %}
 
 {% include tutorial.html %}