Metrics port can't be customized

[martin31821]

Hi,

we're running cnpg in hostNetwork mode and I've run into an issue that the metrics port can't be customized easily through the helm chart.
I'd like to request the following changes:

values.yaml

monitoring:
  port: 8080
  listenHost: ""

deployment.yaml:

# ...
--webhook-port={{.Values.webhook.port}}
--metrics-bind-address={{.Values.monitoring.listenHost}}:{{.Values.monitoring.port}}
# ...
ports:
- containerPort: {{ .Values.monitoring.port }}
  name: metrics
# ...