build(makefile): update Makefile for Helm chart deployment

- Set default image registry to registry-cn-beijing.ack.aliyuncs.com
- Update image repository to acs/cron-operator
- Derive image tag from VERSION file by stripping leading 'v'
- Construct full image URL using registry, repository, and tag variables
- Add Helm chart directory, release name, and namespace variables
- Add helm-upgrade target to install or upgrade Helm chart with image settings
- Add helm-uninstall target to remove Helm chart release
- Add print-% target for easier variable inspection during development

Signed-off-by: Yi Chen <github@chenyicn.net>

Author: ChenYi015

Makefile

@@ -5,14 +5,24 @@ else
 GOBIN=$(shell go env GOBIN)
 endif
 
+# Version of cron-operator (e.g. `v1.2.3`).
+VERSION ?= $(shell cat VERSION)
+
 # Image registry (e.g. `docker.io`)
-IMAGE_REGISTRY ?= docker.io
+IMAGE_REGISTRY ?= registry-cn-beijing.ack.aliyuncs.com
 # Image repository (e.g. `my-repo/my-image`).
-IMAGE_REPOSITORY ?= cron-operator
-# Image tag (e.g. `latest`).
-IMAGE_TAG ?= latest
+IMAGE_REPOSITORY ?= acs/cron-operator
+# Image tag (e.g. `latest` or `1.2.3`).
+IMAGE_TAG ?= $(shell sed 's/^v//g' VERSION)
 # Image URL to use all building/pushing image targets
-IMAGE ?= $(IMAGE_REPOSITORY):$(IMAGE_TAG)
+IMAGE ?= $(IMAGE_REGISTRY)/$(IMAGE_REPOSITORY):$(IMAGE_TAG)
+
+# Cron operator chart directory.
+CRON_OPERATOR_CHART ?= charts/cron-operator
+# Helm release name.
+RELEASE_NAME ?= cron-operator
+# Helm release namespace.
+RELEASE_NAMESPACE ?= cron-operator
 
 # CONTAINER_TOOL defines the container tool to be used for building images.
 # Be aware that the target commands are only tested with Docker which is
@@ -45,6 +55,9 @@ all: build
 help: ## Display this help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
 
+.PHONY: print-%
+print-%: ; @echo $*=$($*)
+
 ##@ Development
 
 .PHONY: manifests
@@ -162,6 +175,21 @@ helm-unittest: helm-unittest-plugin ## Run Helm chart unittests.
 helm-docs: helm-docs-plugin ## Generates markdown documentation for helm charts from requirements and values files.
 	$(HELM_DOCS) --sort-values-order=file
 
+.PHONY: helm-upgrade
+helm-upgrade: ## Upgrade cron-operator helm chart release (install if not exists).
+	$(HELM) upgrade $(RELEASE_NAME) $(CRON_OPERATOR_CHART) \
+	    --install \
+	    --namespace $(RELEASE_NAMESPACE) \
+	    --create-namespace \
+	    --wait \
+	    --set image.registry=${IMAGE_REGISTRY} \
+	    --set image.repository=${IMAGE_REPOSITORY} \
+	    --set image.tag=${IMAGE_TAG}
+
+.PHONY: helm-uninstall
+helm-uninstall: ## Uninstall cron-operator helm chart release.
+	$(HELM) uninstall $(RELEASE_NAME) --namespace $(RELEASE_NAMESPACE)
+
 ##@ Deployment
 
 ifndef ignore-not-found