Update to run composer

Author: Joshua Taylor

Dockerfile

@@ -1,7 +1,42 @@
-FROM php:7-fpm
+FROM php:7-fpm-alpine
 
-COPY . .
+RUN apk add --no-cache --virtual .composer-rundeps git subversion openssh-client mercurial tini bash patch make zip unzip coreutils \
+ && apk add --no-cache --virtual .build-deps zlib-dev libzip-dev \
+ && docker-php-ext-configure zip --with-libzip \
+ && docker-php-ext-install -j$(getconf _NPROCESSORS_ONLN) zip opcache \
+ && docker-php-ext-install pdo_mysql \
+ && runDeps="$( \
+    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 --no-cache --virtual .composer-phpext-rundeps $runDeps \
+ && apk del .build-deps \
+ && printf "# composer php cli ini settings\n\
+date.timezone=UTC\n\
+memory_limit=-1\n\
+opcache.enable_cli=1\n\
+" > $PHP_INI_DIR/php-cli.ini
+
+ENV COMPOSER_ALLOW_SUPERUSER 1
+ENV COMPOSER_HOME /tmp
+ENV COMPOSER_VERSION 1.9.0
 
-RUN docker-php-ext-install pdo_mysql
+RUN curl --silent --fail --location --retry 3 --output /tmp/installer.php --url https://raw.githubusercontent.com/composer/getcomposer.org/cb19f2aa3aeaa2006c0cd69a7ef011eb31463067/web/installer \
+ && php -r " \
+    \$signature = '48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5'; \
+    \$hash = hash('sha384', file_get_contents('/tmp/installer.php')); \
+    if (!hash_equals(\$signature, \$hash)) { \
+      unlink('/tmp/installer.php'); \
+      echo 'Integrity check failed, installer is either corrupt or worse.' . PHP_EOL; \
+      exit(1); \
+    }" \
+ && php /tmp/installer.php --no-ansi --install-dir=/usr/bin --filename=composer --version=${COMPOSER_VERSION} \
+ && composer --ansi --version --no-interaction \
+ && rm -f /tmp/installer.php \
+ && find /tmp -type d -exec chmod -v 1777 {} +
+
+COPY . .
 
-RUN apt-get update && apt-get install -y iputils-ping && apt-get clean all
+RUN composer install