installer: create namespace with kustomization
diff --git a/core/installer/cmd/env-tmpl/kustomization.yaml b/core/installer/cmd/env-tmpl/kustomization.yaml
index 8ac663b..70db25f 100644
--- a/core/installer/cmd/env-tmpl/kustomization.yaml
+++ b/core/installer/cmd/env-tmpl/kustomization.yaml
@@ -1,6 +1,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-  - config-secret.yaml
-  - config-source.yaml
-  - config-kustomization.yaml
+- namespace.yaml
+- config-secret.yaml
+- config-source.yaml
+- config-kustomization.yaml