FROM golang:1.25-alpine AS builder

ARG CHECKER_VERSION=custom-build
ARG TARGET=checker-caldav

WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -ldflags "-X main.Version=${CHECKER_VERSION}" -o /checker ./cmd/${TARGET}

FROM scratch
COPY --from=builder /checker /checker
USER 65534:65534
EXPOSE 8080
ENTRYPOINT ["/checker"]