https://docs.docker.com/engine/reference/builder/
WD=/opt/dockerfile mkdir -p $WD/{setup,conf} cd $WD/setup
cat << 'EOF' >Dockerfile FROM debian:buster MAINTAINER FreeSoftwareServers ARG DEBIAN_FRONTEND=noninteractive RUN apt-get update RUN apt-get install -y apache2 RUN apt-get clean ENTRYPOINT ["apache2ctl"] CMD ["-D","FOREGROUND"] EOF chmod +x Dockerfile
echo y | docker image prune docker stop dockerfiletest docker container rm dockerfiletest docker build --no-cache . -t="dockerfiletest" docker run -d --name dockerfiletest -p 8541:80 dockerfiletest