should use dockerhub_token (#324)

* should use dockerhub_token

* Update Makefile

Author: bwagner5

Makefile

@@ -6,7 +6,7 @@ IMG ?= amazon/aws-node-termination-handler
 IMG_TAG ?= ${VERSION}
 IMG_W_TAG = ${IMG}:${IMG_TAG}
 DOCKER_USERNAME ?= ""
-DOCKER_PASSWORD ?= ""
+DOCKERHUB_TOKEN ?= ""
 GOOS ?= linux
 GOARCH ?= amd64
 GOPROXY ?= "https://proxy.golang.org,direct"
@@ -35,7 +35,7 @@ docker-run:
 	docker run ${IMG_W_TAG}
 
 docker-push:
-	@docker login -u ${DOCKER_USERNAME} -p="${DOCKER_PASSWORD}"
+	@docker login -u ${DOCKER_USERNAME} -p="${DOCKERHUB_TOKEN}"
 	docker push ${IMG_W_TAG}
 
 build-docker-images:
@@ -45,11 +45,11 @@ build-docker-images-windows:
 	${MAKEFILE_PATH}/scripts/build-docker-images -p ${SUPPORTED_PLATFORMS_WINDOWS} -r ${IMG} -v ${VERSION}
 
 push-docker-images:
-	@docker login -u ${DOCKER_USERNAME} -p="${DOCKER_PASSWORD}"
+	@docker login -u ${DOCKER_USERNAME} -p="${DOCKERHUB_TOKEN}"
 	${MAKEFILE_PATH}/scripts/push-docker-images -p ${SUPPORTED_PLATFORMS_LINUX} -r ${IMG} -v ${VERSION} -m
 
 push-docker-images-windows:
-	@docker login -u ${DOCKER_USERNAME} -p="${DOCKER_PASSWORD}"
+	@docker login -u ${DOCKER_USERNAME} -p="${DOCKERHUB_TOKEN}"
 	${MAKEFILE_PATH}/scripts/push-docker-images -p ${SUPPORTED_PLATFORMS_WINDOWS} -r ${IMG} -v ${VERSION} -m
 
 version:
@@ -174,4 +174,4 @@ release-prep-patch: create-local-release-tag-patch create-release-prep-pr
 release-prep-custom: # Run make NEW_VERSION=v1.2.3 release-prep-custom to prep for a custom release version
 ifdef NEW_VERSION
 	$(shell echo "${MAKEFILE_PATH}/scripts/create-local-tag-for-release -v $(NEW_VERSION) && echo && make create-release-prep-pr")
-endif
+endif