Build multi-arch images by default

images/e2e-prow/Makefile

@@ -1,22 +1,16 @@
 TAG ?=v$(shell date +%m%d%Y)-$(shell git rev-parse --short HEAD)
 REGISTRY ?= quay.io/kubernetes-ingress-controller
-DOCKER ?= docker
 
 IMAGE = $(REGISTRY)/e2e-prow
 
-all: docker-build docker-push
-
-docker-build:
+.PHONY: image
+image:
 	$(DOCKER) buildx build \
 		--pull \
-		--load \
+		--push \
+		--platform amd64 \
 		--build-arg K8S_RELEASE=v1.17.0 \
 		--build-arg ETCD_VERSION=v3.3.18 \
 		--build-arg KIND_VERSION=v0.8.0 \
 		--build-arg GO_VERSION=1.14.2 \
 		-t $(IMAGE):$(TAG) .
-
-docker-push:
-	$(DOCKER) push $(IMAGE):$(TAG)
-	$(DOCKER) tag $(IMAGE):$(TAG) $(IMAGE):latest
-	$(DOCKER) push $(IMAGE):latest