Dockerfile

FROM php:rc-fpm-alpine

ARG BUILD_DATE
ARG VCS_REF

ENV COMPOSER_ALLOW_SUPERUSER 1
ENV PHP_XDEBUG_DEFAULT_ENABLE ${PHP_XDEBUG_DEFAULT_ENABLE:-1}
ENV PHP_XDEBUG_REMOTE_ENABLE ${PHP_XDEBUG_REMOTE_ENABLE:-1}
ENV PHP_XDEBUG_REMOTE_HOST ${PHP_XDEBUG_REMOTE_HOST:-"127.0.0.1"}
ENV PHP_XDEBUG_REMOTE_PORT ${PHP_XDEBUG_REMOTE_PORT:-9000}
ENV PHP_XDEBUG_REMOTE_AUTO_START ${PHP_XDEBUG_REMOTE_AUTO_START:-1}
ENV PHP_XDEBUG_REMOTE_CONNECT_BACK ${PHP_XDEBUG_REMOTE_CONNECT_BACK:-1}
ENV PHP_XDEBUG_IDEKEY ${PHP_XDEBUG_IDEKEY:-docker}
ENV PHP_XDEBUG_PROFILER_ENABLE ${PHP_XDEBUG_PROFILER_ENABLE:-0}
ENV PHP_XDEBUG_PROFILER_OUTPUT_DIR ${PHP_XDEBUG_PROFILER_OUTPUT_DIR:-"/tmp"}

LABEL Maintainer="Zaher Ghaibeh <z@zah.me>" \
      Description="Lightweight php 7.3 RC container based on alpine with xDebug enabled & composer installed." \
      org.label-schema.name="zaherg/php-7.3-rc-xdebug-alpine" \
      org.label-schema.description="Lightweight php php 7.3 RC container based on alpine with xDebug enabled & composer installed." \
      org.label-schema.build-date=$BUILD_DATE \
      org.label-schema.vcs-url="https://github.com/linuxjuggler/php-7.3-rc-xdebug-alpine.git" \
      org.label-schema.vcs-ref=$VCS_REF \
      org.label-schema.schema-version="1.0.0"

RUN set -ex \
  	&& apk update \
    && apk add --no-cache git mysql-client curl openssh-client icu libpng freetype libzip \
       libjpeg-turbo postgresql-dev libffi-dev libsodium \
    && apk add --no-cache --virtual build-dependencies icu-dev libxml2-dev freetype-dev libzip-dev libpng-dev \
        libjpeg-turbo-dev g++ make autoconf libsodium-dev\
    && mkdir /src && cd /src && git clone https://github.com/xdebug/xdebug.git \
    && cd xdebug \
    && sh ./rebuild.sh \    
    && docker-php-source extract \
    && pecl install redis libsodium \
    && docker-php-ext-enable xdebug redis sodium \
    && docker-php-source delete \
    && docker-php-ext-configure pgsql -with-pgsql=/usr/local/pgsql \
    && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
    && docker-php-ext-install -j$(nproc) pdo pgsql pdo_mysql pdo_pgsql intl zip gd \
    && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
    && cd  / && rm -fr /src \
    && apk del build-dependencies \
    && rm -rf /tmp/* 

COPY xdebug.ini /usr/local/etc/php/conf.d/xdebug-dev.ini

USER www-data

WORKDIR /var/www
CMD ["php-fpm"]