include crd def. in kustomization

Author: FxKu

docs/quickstart.md

@@ -56,8 +56,8 @@ kubectl create -f manifests/postgres-operator.yaml  # deployment
 ```
 
 There is a [Kustomization](https://github.com/kubernetes-sigs/kustomize)
-manifest that [combines the mentioned resources](../manifests/kustomization.yaml)
-(except for the CRD) - it can be used with kubectl 1.14 or newer as easy as:
+manifest that [combines the mentioned resources](../manifests/kustomization.yaml).
+It can be used with kubectl 1.14 or newer as easy as:
 
 ```bash
 kubectl apply -k github.com/zalando/postgres-operator/manifests

manifests/kustomization.yaml

@@ -1,6 +1,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
+- operatorconfiguration.crd.yaml
 - postgresql-operator-default-configuration.yaml
 - operator-service-account-rbac.yaml
 - postgres-operator.yaml