FROM golang:alpine AS builder
RUN apk --no-cache --no-progress add upx
WORKDIR /go/build

COPY . .
RUN echo Building && \
    go get -u && \
    env CGO_ENABLED=0 go build -trimpath -ldflags="all=-s -w -buildid= -X main.version=v$(cat VERSION) -X main.buildtime=$(date +%FT%T%z)" -o pathway && \
    echo Compressing && \
    upx pathway > /dev/null

FROM scratch
COPY --from=builder /go/build/pathway /pathway

EXPOSE 8080
CMD ["/pathway"]