added makefile to speed up building, pushing & signing docker images

https://github.com/fphammerle/systemctl-mqtt/blob/f5d08933126e1a017d7443e01447b535b3c0db1e/Makefile

Makefile

@@ -0,0 +1,19 @@
+# sync with https://github.com/fphammerle/switchbot-mqtt/blob/master/Makefile
+
+DOCKER_IMAGE_NAME := fphammerle/cnteertinoh-cc1101-mqtt
+DOCKER_TAG_VERSION := $(shell git describe --match=v* --dirty | sed -e 's/^v//')
+ARCH := $(shell arch)
+DOCKER_TAG_ARCH_SUFFIX_aarch64 := arm64
+DOCKER_TAG_ARCH_SUFFIX_armv6l := armv6
+DOCKER_TAG_ARCH_SUFFIX_x86_64 := amd64
+DOCKER_TAG_ARCH_SUFFIX = ${DOCKER_TAG_ARCH_SUFFIX_${ARCH}}
+DOCKER_TAG = ${DOCKER_TAG_VERSION}-${DOCKER_TAG_ARCH_SUFFIX}
+
+.PHONY: docker-build docker-push
+
+docker-build:
+	sudo docker build -t "${DOCKER_IMAGE_NAME}:${DOCKER_TAG}" .
+
+docker-push: docker-build
+	sudo docker push "${DOCKER_IMAGE_NAME}:${DOCKER_TAG}"
+	@echo git tag --sign --message '$(shell sudo docker image inspect --format '{{join .RepoDigests "\n"}}' "${DOCKER_IMAGE_NAME}:${DOCKER_TAG}")' docker/${DOCKER_TAG} $(shell git rev-parse HEAD)