Separated dockerising from code

docker/Dockerfile

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+FROM scratch
+# EXPOSE 53/udp
+WORKDIR /home/weave
+ADD ./dns /home/weave/weavedns
+ENTRYPOINT ["/home/weave/weavedns"]

docker/Makefile

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+IMAGE:=/tmp/weavedns.tar
+
+.DEFAULT: docker-image
+
+all: docker-image
+
+dns: ../*.go main.go
+	go get && GOARCH=amd64 GOOS=linux go build -v
+
+.PHONY: docker-image
+
+docker-image: $(IMAGE)
+
+$(IMAGE): Dockerfile dns
+	sudo -E docker build --rm -t zettio/weavedns .
+	sudo -E docker save zettio/weavedns > $(IMAGE)
+
+clean:
+	-sudo docker rmi zettio/weavedns
+	rm -f dns $(IMAGE)