ci: docker cache in a separate image

Author: iaymerich

Makefile

@@ -43,10 +43,10 @@ buildcontainer-% publishcontainer-%:
 	@export DOCKER_BUILD_ARG="$(DOCKER_BUILD_ARG) $(if $(findstring publishcontainer,$@),--push,--load) $(if $(filter false,$(CACHE)),--no-cache,)"; \
 	docker buildx build \
 		$${DOCKER_BUILD_ARG} \
-		--cache-from $(IMAGE_NAME):$*-$(GIT_BRANCH_NAME) \
-		--cache-from $(IMAGE_NAME):$*-main \
-		-t $(IMAGE_NAME):$*-$(PROJECT_VERSION) \
-		-t $(IMAGE_NAME):$*-$(GIT_BRANCH_NAME) \
+		--export-cache type=registry,ref=$(IMAGE_NAME):$*-cache-$(GIT_BRANCH_NAME) \
+		--cache-from $(IMAGE_NAME):$*-cache-$(GIT_BRANCH_NAME) \
+		--cache-from $(IMAGE_NAME):$*-cache-main \
+		-t $(IMAGE_NAME):$*-$(PROJECT_VERSION)
 		-f Dockerfile \
 		--target $* \
 		. ;