Prepare switch to gcr.io

Makefile

@@ -48,7 +48,7 @@ ifeq ($(ARCH),)
     $(error mandatory variable ARCH is empty, either set it when calling the command or make sure 'go env GOARCH' works)
 endif
 
-REGISTRY ?= quay.io/kubernetes-ingress-controller
+REGISTRY ?= gcr.io/k8s-staging-ingress-nginx
 
 BASE_IMAGE ?= us.gcr.io/k8s-artifacts-prod/ingress-nginx/nginx:v20200708-g00f4a215d@sha256:b0727cebafc35f5ab50f3fa0be5fda7f79937f1683f525f40982e75b882195d8
 
@@ -65,12 +65,12 @@ image: clean-image ## Build image for a particular arch.
 		--build-arg BASE_IMAGE="$(BASE_IMAGE)" \
 		--build-arg VERSION="$(TAG)" \
 		--build-arg TARGETARCH="$(ARCH)" \
-		-t $(REGISTRY)/nginx-ingress-controller:$(TAG) rootfs
+		-t $(REGISTRY)/controller:$(TAG) rootfs
 
 .PHONY: clean-image
 clean-image: ## Removes local image
-	echo "removing old image $(REGISTRY)/nginx-ingress-controller:$(TAG)"
-	@docker rmi -f $(REGISTRY)/nginx-ingress-controller:$(TAG) || true
+	echo "removing old image $(REGISTRY)/controller:$(TAG)"
+	@docker rmi -f $(REGISTRY)/controller:$(TAG) || true
 
 .PHONY: build
 build:  ## Build ingress controller, debug tool and pre-stop hook.
@@ -213,4 +213,4 @@ release: ensure-buildx clean
 		--platform $(subst $(SPACE),$(COMMA),$(PLATFORMS)) \
 		--build-arg BASE_IMAGE="$(BASE_IMAGE)" \
 		--build-arg VERSION="$(TAG)" \
-		-t $(REGISTRY)/nginx-ingress-controller:$(TAG) rootfs
+		-t $(REGISTRY)/controller:$(TAG) rootfs