FROM alpine:3.19 AS build

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

WORKDIR /app
COPY . .
RUN gcc -o deployment deployment.c

# Final-Stage
FROM alpine:3.19


RUN adduser -D -u 1000 appuser

WORKDIR /app


RUN mkdir /output && chown appuser:appuser /output


COPY --from=build /app/deployment .
RUN chown appuser:appuser ./deployment

# Volume deklarieren → Drone/Docker kann es mounten
VOLUME ["/output"]

# Als non-root laufen
USER appuser

# Healthcheck: prüft ob Output geschrieben wurde
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD test -f /output/output.txt || exit 1

CMD ["sh", "-c", "./deployment 10 > /output/output.txt"]