# Base-Image
# -------- BUILD STAGE --------
FROM gcc:13 AS builder

WORKDIR /build
COPY deployment.c .

RUN gcc -O2 -o deployment deployment.c


# -------- RUNTIME STAGE --------
FROM debian:bookworm-slim

# Minimal installieren
RUN apt-get update && apt-get install -y \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Non-root user erstellen
RUN useradd -m appuser

WORKDIR /app

# Binary kopieren
COPY --from=builder /build/deployment .

# Output-Verzeichnis
RUN mkdir /output && chown appuser:appuser /output

# Rechte setzen
USER appuser

# Volume definieren
VOLUME ["/output"]

# Healthcheck (prüft ob Datei existiert & nicht leer ist)
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s \
  CMD test -s /output/output.txt || exit 1

# Start
ENTRYPOINT ["sh", "-c"]
CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]