Bug: Service return an error when httpsPort set to null

[erwan-b]

By default the Ingress use the https port to interact with the service. Becose the value httpsPort is set by default to 443.
And if we want to disable it, with a null, to force the Ingress to use httpPort we got this error:

Error: UPGRADE FAILED: cannot patch "flipt" with kind Service: Service "flipt" is invalid: spec.ports[1].port: Invalid value: 0: must be between 1 and 65535, inclusive

The service allways configure https port, so if set to null this create an error.

link to the chat on the PR #197

[erwan-b]

I see 2 simple way to avoid this error:

If condition in the service file, to avoid the error:

      {{- if .Values.service.httpsPort }}
     - port: {{ .Values.service.httpsPort }}
       targetPort: https
       protocol: TCP
       name: https
      {{- end}}

Service port in the value.yaml + new definition of the svcPort in the ingress file.

ingress:
  servicePort: 443

+

{{- $svcPort := .Values.ingress.servicePort -}}