Update Makefile

Makefile

 # a helper shell script
-MAKE_VERSION=1.2.7
+MAKE_VERSION=1.2.8
 
 define MAKEFUNCTIONCODE
 	function hasChanges() {
@@ -186,6 +186,8 @@ init:
 
 build: init pre-build docker-build post-build
 
+buildx: init pre-build docker-buildx post-build
+
 cleanbuild: init pre-build docker-cleanbuild post-build
 
 pre-build:
@@ -199,6 +201,9 @@ post-push:
 post-init:
 	@rm .make-function
 
+docker-buildx:
+	docker buildx build --push --platform linux/arm64/v8,linux/amd64 $(BUILDARG) --tag $(IMAGE):$(VERSIONHASH) $(PROJECTPATH)
+
 docker-build:
 	docker build --platform=linux/amd64 $(BUILDARG) -t $(IMAGE):$(VERSIONHASH) $(PROJECTPATH)
 	@DOCKER_MAJOR=$(shell docker -v | sed -e 's/.*version //' -e 's/,.*//' | cut -d\. -f1) ; \