FROM golang:1.20-alpine as builder

WORKDIR /prometheus-exporter-merger
COPY . .

RUN CGO_ENABLED=0 go build -ldflags "-s -w" .

FROM scratch
USER nobody

COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /prometheus-exporter-merger/prometheus-exporter-merger /prometheus-exporter-merger

EXPOSE 8080
CMD ["/prometheus-exporter-merger", "--config", "/config/prometheus-exporter-merger.yaml"]