FROM golang as builder

ENV BIRD_EXPORTER_VERSION 1.4.1

WORKDIR /go/
RUN git clone -b $BIRD_EXPORTER_VERSION https://github.com/czerwonk/bird_exporter.git

WORKDIR /go/bird_exporter
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o /go/bin/bird_exporter

FROM alpine:latest
RUN apk --no-cache add ca-certificates bash
WORKDIR /app
COPY --from=builder /go/bin/bird_exporter .
EXPOSE 9324

ENTRYPOINT ["/app/bird_exporter"]