Add nginx proxy for router in development
Add nginx proxy for router in development

In production the router API has a base URI of
http://router.cluster:8088/router
In development this is http://router.cluster:11200

This change adds an nginx proxy entry so that the production URL will
also work in development.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet