hello-ci/Dockerfile

# build stage
FROM ubuntu:18.04 AS build
ENV DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin

RUN apt-get update && \
    apt-get -y install --no-install-recommends g++ && \
    rm -rf /var/lib/apt/lists/*

COPY main.cpp /app/main.cpp
WORKDIR /app
RUN g++ -o main main.cpp

# run stage
FROM ubuntu:18.04 AS run
ENV DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin

RUN apt-get update && \
    apt-get -y install --no-install-recommends file && \
    rm -rf /var/lib/apt/lists/*

COPY --from=build /app/main /app/main
COPY run.sh /app/run.sh
RUN chmod +x /app/run.sh
CMD ["/app/run.sh"]