Dockerfile

FROM docker:18.06.1

LABEL com.example.vendor="PARAGON Executive Service GmbH" \
      maintainer="juergen@paragon-es.de" \
      version="1.0.0" \
      description="An image for GitLab runner to build and test Drupal projects."

ARG compose_version=1.21.2

RUN apk update && \
    apk add --no-cache curl openssl openssh ca-certificates wget make && \
    \
    wget -q https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub -O /etc/apk/keys/sgerrand.rsa.pub && \
    wget -q https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk && \
    apk add --no-cache glibc-2.28-r0.apk && \
    rm glibc-2.28-r0.apk && \
    ln -s /lib/libz.so.1 /usr/glibc-compat/lib/ && \
    ln -s /lib/libc.musl-x86_64.so.1 /usr/glibc-compat/lib && \
    \
    apk add --no-cache bash python nodejs git unzip \
        php7 php7-phar php7-json php7-dom php7-gd php7-mbstring php7-openssl \
        php7-pdo php7-curl php7-xml php7-zip php7-session php7-ctype \
        php7-tokenizer php7-simplexml php7-xmlwriter && \
    ln -s /usr/bin/php7 /usr/local/bin/php &&\
    \
    wget -q https://github.com/docker/compose/releases/download/${compose_version}/docker-compose-`uname -s`-`uname -m` -O /usr/local/bin/docker-compose && \
    chmod +x /usr/local/bin/docker-compose && \
    \
    wget -q https://getcomposer.org/composer.phar -O /usr/local/bin/composer && \
    chmod +x /usr/local/bin/composer && \
    composer selfupdate && \
    \
    git clone https://github.com/tj/git-extras.git && \
    cd git-extras && \
    git checkout $(git describe --tags $(git rev-list --tags --max-count=1)) && \
    make install && \
    cd .. && \
    rm -rf git-extras