ARG REPO=library
FROM ${REPO}/golang:1.11-alpine AS builder

COPY ./go.mod ./go.sum /go/src/app/

RUN go mod download

COPY ./main.go /go/src/app/

RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go build -a -installsuffix nocgo -o dockron .

FROM ${REPO}/busybox:latest
WORKDIR /root/
COPY --from=builder /go/src/app/dockron .

CMD [ "./dockron" ]