Adding boilerplate files

Signed-off-by: Per Ploug <per.ploug@zalando.de>

example/Makefile

@@ -0,0 +1,42 @@
+.PHONY: clean test check build.local build.linux build.osx build.docker build.push
+
+BINARY        ?= custom-metrics-consumer
+VERSION       ?= $(shell git describe --tags --always --dirty)
+IMAGE         ?= mikkeloscar/$(BINARY)
+TAG           ?= $(VERSION)
+SOURCES       = $(shell find . -name '*.go')
+DOCKERFILE    ?= Dockerfile
+GOPKGS        = $(shell go list ./...)
+BUILD_FLAGS   ?= -v
+LDFLAGS       ?= -X main.version=$(VERSION) -w -s
+
+default: build.local
+
+clean:
+	rm -rf build
+
+test:
+	go test -v $(GOPKGS)
+
+check:
+	golint $(GOPKGS)
+	go vet -v $(GOPKGS)
+
+build.local: build/$(BINARY)
+build.linux: build/linux/$(BINARY)
+build.osx: build/osx/$(BINARY)
+
+build/$(BINARY): $(SOURCES)
+	CGO_ENABLED=0 go build -o build/$(BINARY) $(BUILD_FLAGS) -ldflags "$(LDFLAGS)" .
+
+build/linux/$(BINARY): $(SOURCES)
+	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build $(BUILD_FLAGS) -o build/linux/$(BINARY) -ldflags "$(LDFLAGS)" .
+
+build/osx/$(BINARY): $(SOURCES)
+	GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build $(BUILD_FLAGS) -o build/osx/$(BINARY) -ldflags "$(LDFLAGS)" .
+
+build.docker: build.linux
+	docker build --rm -t "$(IMAGE):$(TAG)" -f $(DOCKERFILE) .
+
+build.push: build.docker
+	docker push "$(IMAGE):$(TAG)"