Dockerfile-golang-multistage

# STEP 1 build executable binary
FROM golang:alpine as builder
COPY . $GOPATH/src/
WORKDIR $GOPATH/src/
#add git to builder image
RUN apk update && apk add git
#get dependancies
RUN go get -d -v
#build the binary
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -ldflags="-w -s" -o /go/bin/gocalc

# STEP 2 build a small image
# start from scratch
FROM scratch
# Copy our static executable
COPY --from=builder /go/bin/gocalc /go/bin/gocalc
ENTRYPOINT ["/go/bin/gocalc"]