Add postgres/keycloak operators.

+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - https://raw.githubusercontent.com/keycloak/keycloak-k8s-resources/18.0.2/kubernetes/keycloaks.k8s.keycloak.org-v1.yml
+  - https://raw.githubusercontent.com/keycloak/keycloak-k8s-resources/18.0.2/kubernetes/keycloakrealmimports.k8s.keycloak.org-v1.yml
+  - https://raw.githubusercontent.com/keycloak/keycloak-k8s-resources/18.0.2/kubernetes/kubernetes.yml
+

+environments:
+  default:
+    values:
+      - namespace: keycloak-operator
+---
+
+repositories:
+
+releases:
+  - name: keycloak-operator
+    namespace: {{ .Values.namespace }}
+    chart: charts/keycloak-operator
+

+environments:
+  default:
+    values:
+      - namespace: postgres-operator
+
+repositories:
+  - name: postgres-operator-charts
+    url: https://opensource.zalando.com/postgres-operator/charts/postgres-operator
+
+releases:
+  - name: postgres-operator
+    namespace: {{ .Values.namespace }}
+    chart: postgres-operator-charts/postgres-operator
+    disableValidation: true