Bump version to 0.5.0

Fix build process to work with Dockerhub

Dockerfile

@@ -1,11 +1,14 @@
-FROM alpine
-
-WORKDIR /root
-
-RUN apk update && apk add ca-certificates openssl && update-ca-certificates
-
-# download release of ecs-gen
-ENV ECS_GEN_RELEASE 0.3.2
-RUN wget https://github.com/codesuki/ecs-gen/releases/download/$ECS_GEN_RELEASE/ecs-gen-linux-amd64.zip && unzip ecs-gen-linux-amd64.zip && cp ecs-gen-linux-amd64 /usr/local/bin/ecs-gen
-
+FROM golang:1.7.3-alpine AS builder
+RUN apk update && apk add --no-cache git make
+WORKDIR /go/src/github.com/codesuki/ecs-gen
+COPY glide.lock glide.yaml Makefile /go/src/github.com/codesuki/ecs-gen/
+# to statically link
+ENV CGO_ENABLED 0
+RUN go get -u github.com/Masterminds/glide && make deps
+COPY . .
+RUN make build
+
+FROM alpine:3.8
+RUN apk update && apk add --no-cache ca-certificates openssl && update-ca-certificates
+COPY --from=builder /go/src/github.com/codesuki/ecs-gen/build/ecs-gen-linux-amd64 /usr/bin/ecs-gen
 CMD ["ecs-gen"]

Makefile

@@ -5,18 +5,18 @@ WORKDIR = /go/src/github.com/codesuki/ecs-gen
 
 LDFLAGS = -X main.version=$(VERSION)
 
-.PHONY: docker build clean deps
+.PHONY: docker build clean deps zip
 
 docker:
-	docker build -t ecs-gen-builder:latest -f Dockerfile.build .
-	docker run --rm -v $(CURDIR):$(WORKDIR) ecs-gen-builder
-	docker build -t ecs-gen:latest -f Dockerfile .
+	docker build --target builder -t ecs-gen:latest .
+	docker run -v $(CURDIR)/build:/mnt/build --rm ecs-gen:latest cp -R $(WORKDIR)/build/ /mnt/
+	docker build -t ecs-gen:latest .
 	docker run --rm ecs-gen:latest ecs-gen --version
 
 build: deps
 	for GOOS in darwin linux; do \
 		for GOARCH in 386 amd64; do \
-			GOOS=$$GOOS GOARCH=$$GOARCH go build -ldflags "$(LDFLAGS)" -v -o build/$(NAME)-$$GOOS-$$GOARCH ; \
+			GOOS=$$GOOS GOARCH=$$GOARCH go build -ldflags "$(LDFLAGS)" -o build/$(NAME)-$$GOOS-$$GOARCH ; \
 		done \
 	done