Dockerfile

FROM php:7.2-fpm-alpine

RUN apk add --no-cache \
    nginx \
    supervisor

# Install dependencies
RUN set -ex; \
    \
    apk add --no-cache --virtual .build-deps \
        bzip2-dev \
        freetype-dev \
        libjpeg-turbo-dev \
        libpng-dev \
        libwebp-dev \
        libxpm-dev \
    ; \
    \
    docker-php-ext-configure gd --with-freetype-dir=/usr --with-jpeg-dir=/usr --with-webp-dir=/usr --with-png-dir=/usr --with-xpm-dir=/usr; \
    docker-php-ext-install bz2 gd mysqli opcache zip; \
    \
    runDeps="$( \
        scanelf --needed --nobanner --format '%n#p' --recursive /usr/local/lib/php/extensions \
            | tr ',' '\n' \
            | sort -u \
            | awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
    )"; \
    apk add --virtual .phpmyadmin-phpexts-rundeps $runDeps; \
    apk del .build-deps

# Calculate download URL
ENV VERSION 4.8.3
ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
LABEL version=$VERSION

# Download tarball, verify it using gpg and extract
RUN set -ex; \
    apk add --no-cache --virtual .fetch-deps \
        gnupg \
    ; \
    \
    export GNUPGHOME="$(mktemp -d)"; \
    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
    curl --output phpMyAdmin.tar.xz --location $URL; \
    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
    gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
        || gpg --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
        || gpg --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
        || gpg --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
        || gpg --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
    tar -xf phpMyAdmin.tar.xz; \
    gpgconf --kill all; \
    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
    mv phpMyAdmin-$VERSION-all-languages /www; \
    rm -rf /www/setup/ /www/examples/ /www/test/ /www/po/ /www/composer.json /www/RELEASE-DATE-$VERSION; \
    sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /www/libraries/vendor_config.php; \
    chown -R nobody:nogroup /www; \
    find /www -type d -exec chmod 750 {} \; ; \
    find /www -type f -exec chmod 640 {} \; ; \
# Add directory for sessions to allow session persistence
    mkdir /sessions; \
    mkdir -p /www/tmp; \
    chmod -R 777 /www/tmp; \
    apk del .fetch-deps

# Copy configuration
COPY etc /etc/
COPY php.ini /usr/local/etc/php/conf.d/php-phpmyadmin.ini

# Copy main script
COPY run.sh /run.sh

# We expose phpMyAdmin on port 80
EXPOSE 80

ENTRYPOINT [ "/run.sh" ]
CMD ["supervisord", "-n"]