FROM alpine:3.23 AS builder

RUN apk upgrade --no-cache && apk add --no-cache gcc musl-dev

WORKDIR /app

COPY . .

RUN gcc -O2 -o deployment deployment.c


FROM alpine:3.23

RUN apk upgrade --no-cache

WORKDIR /app

COPY --from=builder /app/deployment /app/deployment

RUN addgroup -S appuser \
&& adduser -S appuser -G appuser \
&& mkdir /output \
&& chown -R appuser:appuser /app /output

VOLUME ["/output"]

USER appuser

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
CMD test -s /output/output.txt || exit 1

ENTRYPOINT ["/bin/sh", "-c"]
CMD ["./deployment 10 2>&1 | tee /output/output.txt"]