FROM golang:1.22-bullseye AS dev

COPY . /var/app
WORKDIR /var/app


ENV GO111MODULE="on" \
    CGO_ENABLED=0 \
    GOOS=linux

EXPOSE 80
ENTRYPOINT ["sh"]


FROM dev as build

RUN DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --assume-yes ca-certificates
RUN go mod download && go mod verify
RUN go build -o ntppool-exporter main.go
RUN chmod +x ntppool-exporter


FROM debian:12 AS prod

WORKDIR /app
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=build /var/app/ntppool-exporter /bin/

LABEL maintainer="Adora Laura Kalb <adora@lila.network>"

EXPOSE     43609
ENTRYPOINT ["/bin/ntppool-exporter"]