The current documentation references the newer todo list built in the [Getting Started demo](https://docs.docker.com/get-started/02_our_app/) built in previous steps, but the docs listed the code for the older [BulletinBoard:1.0 image](http://www.myclass5.cn/get-started/part2/). So, this patch applies the following to run Getting Started:
- changed the name of the image to `getting-started`, and rebuild the image using `docker build -t getting-started .`
- changed the port numbers under the `ports` key in the Kubernetes YAML to *3000*
* Update Get started docs
* update part-1, add redirects
* draft updates to part 2 and 3
* tidy up the orchestration topics
* update examples, and other minor edits
* address Stefan's review comments
* moved orchestration to a new node
* fix Ben's review comments
* add email verification step
* Emphasize the CTA in part 3