FROM alpine:3.21.0 as build RUN apk add --no-cache \ cmake \ gcc \ git \ libmilter-dev \ make \ musl-dev COPY . /milterfrom WORKDIR /milterfrom RUN mkdir build \ && cd build \ && cmake -DWITH_SYSTEMD=OFF .. \ && make FROM alpine:3.21.0 as service RUN adduser -S milterfrom \ && apk add libmilter COPY --from=build /milterfrom/build/milterfrom /usr/local/bin/ USER milterfrom EXPOSE 8890/tcp CMD ["milterfrom", "-s", "inet:8890"]