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+# Only the instructions RUN, COPY, ADD create layers
+
+# Reference image
+ FROM ubuntu:latest
+
+# Meta data (OCI standard)
+  LABEL org.opencontainers.image.title="My image"
+  LABEL org.opencontainers.image.description="My description"
+  LABEL org.opencontainers.image.authors="Pierre ROYER <mail@pierreau.fr>"
+  LABEL org.opencontainers.image.url="https://pierreau.fr/pro/"
+  LABEL org.opencontainers.image.version="2"
+  LABEL org.opencontainers.image.revision="1"
+  LABEL org.opencontainers.image.created="2016-11-28T15:00:00+02:00" # UTC+2 (rfc3339)
+# Meta data (not standard)
+  LABEL Environment="production"  Site="Nantes"
+
+# Installing packages without interruption (Debian)
+#  ARG DEBIAN_FRONTEND=noninteractive
+
+# Commands executed during image creation
+# Change mirror source for best performances
+  RUN sed -i 's/ports.ubuntu.com/fr.ports.ubuntu.com/' /etc/apt/sources.list.d/ubuntu.sources
+
+  RUN apt-get update && apt-get upgrade -y
+  RUN apt install -y --no-install-recommends \
+          apache2 \
+          cron \
+          curl \
+          openssh-server \
+          tzdata \
+          vim \
+          wget
+
+# Remove unnecessary files to optimize image size
+  RUN apt clean ; rm -rf /var/lib/apt/lists/*
+
+# Setup time zone
+  ENV TZ=Europe/Paris
+  RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+  RUN dpkg-reconfigure --frontend noninteractive tzdata
+
+# Apache configuration
+  RUN  echo 'ServerName apache.pierreau.fr:80' >> /etc/apache2/apache2.conf
+
+# Copying files from host to container
+#  RUN  cd /var/www/html/
+#  RUN  mv index.html index.html.old
+#  COPY index.html /var/www/html/
+
+#  RUN  wget https://cloud.pierreau.fr/index.html
+
+# Allows adding URLs or archives
+  ADD https://cloud.pierreau.fr/index.html .
+
+# Mount points created in container
+  VOLUME   ["/var/www/html", "/etc/apache2", "/var/log/apache2/"]
+
+# Adding a user
+  RUN   useradd -m -s /bin/bash -p M0t2P@$$ sshuser
+  USER  sshuser
+# Specifies default directory
+  WORKDIR /home/sshuser
+  RUN   echo "df -h" > .profile
+  USER  root
+
+# ENTRYPOINT command (not overridable by docker run) launched at container startup
+# COPY  docker-entrypoint.sh /root/
+# RUN   chmod 700 /root/docker-entrypoint.sh
+# ENTRYPOINT ["/root/docker-entrypoint.sh"]
+
+# Command (overloadable by docker run) launched when the container starts
+  CMD  ["/usr/sbin/apachectl", "-D", "FOREGROUND"]
+
+# For information purposes, specifies the ports/protocols used
+  EXPOSE 80 22/tcp 123/udp