ref(Makefile): refactor make dev-release

This allows us to run `make -C controller config` when we know that
the image is pushed onto the registry and we just need to tell the
cluster to use this image.

Author: Matthew Fisher

Makefile

@@ -33,9 +33,13 @@ restart: stop start
 
 run: install start
 
-dev-release: check-registry check-deisctl
+dev-release: push set-image
+
+push: check-registry
 	docker tag $(IMAGE) $(DEV_IMAGE)
 	docker push $(DEV_IMAGE)
+
+set-image: check-deisctl
 	deisctl config $(COMPONENT) set image=$(DEV_IMAGE)
 
 release: