reduced image size

Dockerfile

@@ -36,11 +36,19 @@ RUN go install github.com/GeertJohan/go.rice/rice
 COPY --from=frontend /src/alice-lg/client/build client/build
 
 # Build backend
+WORKDIR /src/alice-lg
+ADD VERSION .
+
 WORKDIR /src/alice-lg/backend
 ADD backend .
 RUN rice embed-go
 
-RUN go build -o alice-lg-linux-amd64 -ldflags="-X main.version=4.0.3"
+# RUN go build -o alice-lg-linux-amd64 -ldflags="-X main.version=4.0.3"
+RUN make alpine
+
+FROM alpine:latest
+COPY --from=backend /src/alice-lg/backend/alice-lg-linux-amd64 /usr/bin/alice-lg
+RUN ls -lsha /usr/bin/alice-lg
 
 EXPOSE 7340:7340
-CMD ["/src/alice-lg/backend/alice-lg-linux-amd64"]
+CMD ["/usr/bin/alice-lg"]

backend/Makefile

@@ -23,21 +23,26 @@ endif
 LDFLAGS=-ldflags="-X main.version=$(APP_VERSION)"
 FILES=$(shell find . -depth 1 ! -name "*_test.go" -name "*.go")
 
-all: $(TARGET)
+all: deps $(TARGET)
 	@echo "Built $(VERSION) @ $(TARGET)"
 
 deps:
 	GO111MODULE=on go get -v .
 
-osx-dev: deps
+osx-dev:
 	GO111MODULE=on go run $(FILES)
 
-osx: deps
+osx:
 	GO111MODULE=on GOARCH=$(ARCH) GOOS=darwin go build $(LDFLAGS) -o $(PROG)-osx-$(ARCH)
 
-linux: deps
+linux:
 	GO111MODULE=on GOARCH=$(ARCH) GOOS=linux go build $(LDFLAGS) -o $(PROG)-linux-$(ARCH)
 
+alpine:
+	GO111MODULE=on CGO_ENABLED=0 GOOS=linux go build \
+		-a -installsuffix cgo \
+		$(LDFLAGS) -o $(PROG)-linux-$(ARCH)
+
 bundle:
 	rice embed-go