Align Makefile use of IMG:TAG w/ other controllers

Signed-off-by: Paulo Gomes <[email protected]>

Makefile

@@ -1,5 +1,7 @@
 # Image URL to use all building/pushing image targets
-IMG ?= fluxcd/helm-controller:latest
+IMG ?= fluxcd/helm-controller
+TAG ?= latest
+
 # Produce CRDs that work back to Kubernetes 1.16
 CRD_OPTIONS ?= crd:crdVersions=v1
 
@@ -44,20 +46,20 @@ uninstall: manifests
 
 # Deploy controller in the configured Kubernetes cluster in ~/.kube/config
 deploy: manifests
-	cd config/manager && kustomize edit set image fluxcd/helm-controller=${IMG}
+	cd config/manager && kustomize edit set image fluxcd/helm-controller=$(IMG):$(TAG)
 	kustomize build config/default | kubectl apply -f -
 
 # Deploy controller dev image in the configured Kubernetes cluster in ~/.kube/config
 dev-deploy: manifests
 	mkdir -p config/dev && cp config/default/* config/dev
-	cd config/dev && kustomize edit set image fluxcd/helm-controller=${IMG}
+	cd config/dev && kustomize edit set image fluxcd/helm-controller=$(IMG):$(TAG)
 	kustomize build config/dev | kubectl apply -f -
 	rm -rf config/dev
 
 # Delete dev deployment and CRDs
 dev-cleanup: manifests
 	mkdir -p config/dev && cp config/default/* config/dev
-	cd config/dev && kustomize edit set image fluxcd/helm-controller=${IMG}
+	cd config/dev && kustomize edit set image fluxcd/helm-controller=$(IMG):$(TAG)
 	kustomize build config/dev | kubectl delete -f -
 	rm -rf config/dev
 
@@ -93,13 +95,12 @@ generate: controller-gen
 docker-build:
 	docker buildx build \
 	--platform=$(BUILD_PLATFORMS) \
-	-t ${IMG} \
-	--load \
+	-t $(IMG):$(TAG) \
 	${BUILD_ARGS} .
 
 # Push the docker image
 docker-push:
-	docker push ${IMG}
+	docker push $(IMG):$(TAG)
 
 # Find or download controller-gen
 CONTROLLER_GEN = $(shell pwd)/bin/controller-gen