Added docker image

Signed-off-by: Vishal Rana <vr@labstack.com>

Author: vishr

Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine:3.7
+
+COPY dist/linux_amd64/tunnel /usr/local/bin
+
+ENTRYPOINT ["tunnel"]

Makefile

@@ -1,8 +1,12 @@
+IMAGE = labstack/tunnel
 VERSION = 0.2.8
 
 publish:
 	git tag $(VERSION)
 	git push origin --tags
 	goreleaser --rm-dist
+	docker build -t $(IMAGE):$(VERSION) -t $(IMAGE) .
+	docker push $(IMAGE):$(VERSION)
+	docker push $(IMAGE):latest
 
 .PHONY: publish