Dockerfile

FROM ubuntu:16.04
MAINTAINER kukukk <email>

# Install apache2
RUN apt-get update && \
    apt-get -y upgrade && \
    apt-get install -y --no-install-recommends apache2 && \
    rm -rf /var/lib/apt/lists/*

# Enable apache2 modules
RUN a2enmod proxy_http rewrite headers ssl remoteip

# Set up apache2
RUN echo "ServerName localhost" >> /etc/apache2/apache2.conf

# Create required folders to run apache2
RUN mkdir -p /var/lock/apache2
RUN mkdir -p /var/run/apache2

# Create DocumentRoot and configuration folders
RUN mkdir /www /conf /letsencrypt

ENTRYPOINT ["apache2ctl", "-DFOREGROUND"]