Add makefile to handle build process

Makefile

@@ -0,0 +1,35 @@
+REPO_URI ?= github.com/stackanetes
+REPO_PATH ?= $(REPO_URI)/kubernetes-entrypoint
+
+prepare:
+	@echo "Preapre GOPATH"
+	test -h gopath/src/$(REPO_PATH) || \
+		( mkdir -p gopath/src/$(REPO_URI); \
+		ln -s ../../../.. gopath/src/$(REPO_PATH) )
+
+build: prepare
+	@echo "Building kubernetes-entrypoint for $(GOOS)/$(GOARCH) $(GOPATH)"
+	mkdir -p bin/$(GOARCH)
+	go build -o bin/$(GOARCH)/kubernetes_entrypoint
+
+linux-armh64:
+	export GOOS="linux"; \
+	export GOARCH="arm64"; \
+	export GOPATH="$(PWD)/gopath"; \
+	$(MAKE) build
+
+linux-amd64:
+	export GOOS="linux"; \
+	export GOARCH="amd64"; \
+	export GOPATH="$(PWD)/gopath"; \
+	$(MAKE) build
+
+clean:
+	rm -rf gopath
+	rm -rf bin
+
+test: prepare
+	export GOPATH="$(PWD)/gopath"; \
+	go test
+
+all: linux-amd64 linux-arm64