import

.gitlab-ci.yml

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+image: docker:latest
+
+services:
+  - docker:dind
+
+before_script:
+  - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+
+build-master:
+  stage: build
+  script:
+    - docker build --pull -t "$CI_REGISTRY_IMAGE" .
+    - docker push "$CI_REGISTRY_IMAGE"
+  only:
+    - master
+
+build:
+  stage: build
+  script:
+    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" .
+    - docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"
+  except:
+    - master

Dockerfile

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+FROM "php:7.1-apache"
+MAINTAINER "Julien Cabillot <dockerimages@cabillot.eu>"
+
+RUN sed -i'' 's/^Listen 80$/Listen 8080/' "/etc/apache2/ports.conf" && \
+    sed -i'' 's/^<VirtualHost \*:80>$/<VirtualHost *:8080>/' '/etc/apache2/sites-enabled/000-default.conf' && \
+    echo -e "RemoteIPHeader X-Real-IP\nRemoteIPProxiesHeader X-Forwarded-By" > "${APACHE_CONFDIR}/conf-available/remoteip.conf" && \
+    a2enconf remoteip && \
+    a2enmod remoteip && \
+    apt-get -y autoremove --purge && \
+    apt-get -y clean all && \
+    rm -rf "/usr/share/doc/*" \
+       "/var/cache/*" \
+       "/var/lib/apt/lists/*" \
+       "/usr/src/*" \
+       "/var/cache/*" \
+       "/var/log/"{apt/*,dpkg.log} \
+       "/var/www/html" \
+       "/tmp/*"
+
+# Add Tini
+ENV "TINI_VERSION" "v0.16.1"
+ADD "https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini" "/tini"
+RUN chmod +x "/tini"
+ENTRYPOINT ["/tini", "--"]
+
+CMD [ "docker-php-entrypoint", "apache2-foreground" ]
+
+HEALTHCHECK --interval="10s" \
+    CMD curl --fail "http://localhost:8080" || exit 1