Allow users to disable ingress

[danmx]

It's impossible to disable ingress for particular deployments.

One use case would be when multiple services are deployed using FIAAS and only one has to be exposed (have ingress).

[danmx]

fixed using:

ingress:
  host: null

[mortenlj]

Good that you have found a solution. This use case might also fall under the broader perspective of #8, which we have yet to find a good solution for.