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