Re: 'Publish prototypes on the web'

[katylouise]

Improvements to 'Publish prototypes on the web' (https://user-guide.cloud-platform.service.justice.gov.uk/documentation/getting-started/prototype-kit.html)

I recently ran through this page with our interaction designer and we ran into a couple of issues.

1. The command cloud-platform environment prototype create generated a couple of out of date terraform modules which I had to manually update: cloud-platform-terraform-serviceaccount and cloud-platform-terraform-ecr-credentials.

2. It would be helpful to include an example url in the guide that the prototype will be deployed to.