FROM golang:1.24-alpine AS builder
WORKDIR /build
COPY go.mod go.sum ./
RUN go mod download
COPY main.go ./
RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o ctlog-uptime-exporter .

FROM scratch
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /build/ctlog-uptime-exporter /ctlog-uptime-exporter
EXPOSE 9781
ENTRYPOINT ["/ctlog-uptime-exporter"]