FROM debian as builder

RUN apt-get update && \
    apt-get install -y git golang

WORKDIR /src/
COPY *.go go.mod go.sum /src/
RUN CGO_ENABLED=0 go build -ldflags '-extldflags "-static"' -o feed

FROM scratch

COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /src/feed /feed
COPY static/* /static/
COPY index.html /
VOLUME /data

ENTRYPOINT ["/feed"]