ERROR: (gcloud.preview.app) Invalid choice: 'run'

I'm trying to get the golang hello-world bigtable example running locally locally and running into this issue. When I run gcloud preview app run app.yaml from the bigtable-hello directory, I get the following error:

> ➜ bigtable-hello gcloud preview app run app.yaml
> Usage: gcloud
> preview app [optional flags] <group | command> group may be
> modules command may be deploy | gen-config
>
> (BETA) This set of commands allows you to deploy your app, manage your existing deployments, and also run your app locally. These
> commands replace their equivalents in the appcfg tool.
>
> global flags: Run gcloud -h for a description of flags available
> to all commands.
>
> command groups: modules (BETA) View and manage your
> App Engine modules.
>
> commands: deploy (BETA) Deploy the local code
> and/or configuration of
> your app to App Engine. gen-config (BETA) Generate missing configuration files for a
> source directory.
>
> ERROR: (gcloud.preview.app) Invalid choice: 'run'.
>
> Valid choices are [deploy, gen-config, gen-repo-info-file, instances,
> modules, services, versions].

I've put the demo files into my local go directory like below:

app run is no longer part of the gcloud SDK as can be seen under all the possible command trees:

• gcloud alpha has no app command group
• gcloud app has no run command
• gcloud beta has no run command
• gcloud preview app has no app command group

This was removed with version 92.0.0 released on January 13, 2016. That changelog recommends using dev_appserver.py instead. An example can be found in Running the local development server.

> dev_appserver.py src/github.com/jamescharlesworth/bigtable-hello

Other flags and options can be found in dev_appserver.py's documentation in Local Development Server Options.