Switch kustomize base from helmCharts to pre-rendered manifests

kustomize 5.4.3 (bundled in ArgoCD) removed localChartPath and chartPath
from its JSON schema, making helmCharts: with a local chart path invalid.
Pre-render the base manifests with 'make render-helm' instead; overlays
patch the plain YAML as before. ServiceMonitor excluded until Prometheus
is installed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,19 @@
+IMAGE     := git.samidare.dev/rod/hello-svc
+CHART_DIR := helm/hello-svc
+BASE_DIR  := k8s/base
+
+.PHONY: build push render-helm
+
+build:
+	docker build -t $(IMAGE):latest .
+
+push: build
+	docker push $(IMAGE):latest
+
+# Re-render k8s/base/manifest.yaml from the Helm chart.
+# Run this whenever helm/hello-svc/ templates or values.yaml change.
+render-helm:
+	helm template hello-svc $(CHART_DIR) \
+		-f $(BASE_DIR)/values.yaml \
+		--set serviceMonitor.enabled=false \
+		> $(BASE_DIR)/manifest.yaml

k8s/base/kustomization.yaml

@@ -1,8 +1,5 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
-helmCharts:
-  - name: hello-svc
-    releaseName: hello-svc
-    localChartPath: ../../helm/hello-svc
-    valuesFile: values.yaml
+resources:
+  - manifest.yaml

k8s/base/manifest.yaml

@@ -0,0 +1,74 @@
+---
+# Source: hello-svc/templates/service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: hello-svc
+  labels:
+    helm.sh/chart: hello-svc-0.1.0
+    app.kubernetes.io/name: hello-svc
+    app.kubernetes.io/instance: hello-svc
+    app.kubernetes.io/version: "0.1.0"
+    app.kubernetes.io/managed-by: Helm
+spec:
+  type: ClusterIP
+  selector:
+    app.kubernetes.io/name: hello-svc
+    app.kubernetes.io/instance: hello-svc
+  ports:
+    - port: 80
+      targetPort: 8080
+---
+# Source: hello-svc/templates/deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: hello-svc
+  labels:
+    helm.sh/chart: hello-svc-0.1.0
+    app.kubernetes.io/name: hello-svc
+    app.kubernetes.io/instance: hello-svc
+    app.kubernetes.io/version: "0.1.0"
+    app.kubernetes.io/managed-by: Helm
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: hello-svc
+      app.kubernetes.io/instance: hello-svc
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: hello-svc
+        app.kubernetes.io/instance: hello-svc
+    spec:
+      containers:
+        - name: hello-svc
+          image: "git.samidare.dev/rod/hello-svc:latest"
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 8080
+          env:
+            - name: APP_ENV
+              value: "production"
+            - name: APP_VERSION
+              value: "unknown"
+            - name: LOG_LEVEL
+              value: "info"
+          resources:
+            limits:
+              cpu: 500m
+              memory: 128Mi
+            requests:
+              cpu: 100m
+              memory: 64Mi
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: 8080
+            initialDelaySeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /healthz
+              port: 8080
+            initialDelaySeconds: 5

k8s/base/values.yaml

@@ -1,4 +1,5 @@
-# Base Helm values — overlays patch on top of this via strategic merge.
+# Helm values used to render k8s/base/manifest.yaml.
+# Run 'make render-helm' after changing these or the chart templates.
 replicaCount: 1
 
 image: