update Makefile

Makefile

@@ -4,7 +4,6 @@ IMAGE_NAME          ?= cluster-api-provider-vultr
 CONTROLLER_IMAGE    ?= $(REGISTRY)/$(IMAGE_NAME)
 TAG                 ?= dev
 ARCH 				?= amd64
-CONTAINER_TOOL ?= docker
 
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
 ENVTEST_K8S_VERSION = 1.29.0
@@ -85,11 +84,11 @@ run: manifests generate fmt vet ## Run a controller from your host.
 # More info: https://docs.docker.com/develop/develop-images/build_enhancements/
 .PHONY: docker-build
 docker-build: ## Build docker image with the manager.
-	$(CONTAINER_TOOL) build -t $(CONTROLLER_IMAGE):$(TAG) .
+	docker build -t $(CONTROLLER_IMAGE):$(TAG) .
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.
-	$(CONTAINER_TOOL) push $(CONTROLLER_IMAGE):$(TAG)
+	docker push $(CONTROLLER_IMAGE):$(TAG)
 
 # PLATFORMS defines the target platforms for the manager image be built to provide support to multiple
 # architectures. (i.e. make docker-buildx IMG=myregistry/mypoperator:0.0.1). To use this option you need to:
@@ -102,10 +101,10 @@ PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
 docker-buildx: ## Build and push docker image for the manager for cross-platform support
 	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile
 	sed -e '1 s/\(^FROM\)/FROM --platform=\$$\{BUILDPLATFORM\}/; t' -e ' 1,// s//FROM --platform=\$$\{BUILDPLATFORM\}/' Dockerfile > Dockerfile.cross
-	- $(CONTAINER_TOOL) buildx create --name project-v3-builder
-	$(CONTAINER_TOOL) buildx use project-v3-builder
-	- $(CONTAINER_TOOL) buildx build --push --platform=$(PLATFORMS) --tag ${CONTROLLER_IMAGE} -f Dockerfile.cross .
-	- $(CONTAINER_TOOL) buildx rm project-v3-builder
+	- docker buildx create --name project-v3-builder
+	docker buildx use project-v3-builder
+	- docker buildx build --push --platform=$(PLATFORMS) --tag ${CONTROLLER_IMAGE} -f Dockerfile.cross .
+	- docker buildx rm project-v3-builder
 	rm Dockerfile.cross
 
 .PHONY: build-installer