fix local build

Author: mlbiam

Makefile

@@ -104,7 +104,7 @@ build: generate ## build kube-oidc-proxy
 
 docker_build: generate test build ## build docker image
 	GOARCH=$(ARCH) GOOS=linux CGO_ENABLED=0 go build -ldflags '-w $(shell hack/version-ldflags.sh)' -o ./bin/kube-oidc-proxy  ./cmd/.
-	docker buildx build linux/$(ARCH) -t kube-oidc-proxy .
+	docker build -t kube-oidc-proxy .
 
 all: test build ## runs tests, build