FROM alpine:3.13 AS builder

RUN apk add --no-cache build-base

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

FROM alpine:3.13

RUN addgroup -g 1000 appgroup && \
    adduser -D -u 1000 -G appgroup appuser

WORKDIR /app

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

RUN mkdir /output && \
    chown -R appuser:appgroup /app /output

USER appuser

VOLUME /output

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD ps | grep -q '[d]eployment' || exit 1

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