Add a nginx container in the pod for the published data

aptly is just started as an API server in the pod at the moment; So something to serve the published artifacts is required, aptly can do this but it's not great as a static file server. Instead add a simple nginx container to the main pod (to ensure the same filesystem canbe accessed)

This is expected to be served on a different url e.g. repositories.example.com for the published artifacts and repositories-api.example.com for the API

Signed-off-by: Sjoerd Simons sjoerd@collabora.com