FROM golang:1.25-alpine AS builder

WORKDIR /build

COPY go.mod go.sum ./
RUN go mod download

COPY . .

ARG VERSION=dev
RUN CGO_ENABLED=0 go build -ldflags="-s -w -X main.version=${VERSION}" -o waitfordb .

# distroless static ships ca-certificates and runs as an unprivileged user.
FROM gcr.io/distroless/static-debian12:nonroot

COPY --from=builder /build/waitfordb /usr/local/bin/waitfordb

ENTRYPOINT ["waitfordb"]