Use php.ini depending on env

Dockerfile

@@ -52,7 +52,8 @@ RUN set -eux \
 	&& docker-php-ext-enable --ini-name 05-opcache.ini opcache \
 	&& apk del .build-deps
 
-COPY docker/app/php.ini /usr/local/etc/php/php.ini
+RUN ln -s $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini
+COPY docker/app/conf.d/symfony.ini $PHP_INI_DIR/conf.d/symfony.ini
 COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
 COPY docker/app/docker-entrypoint.sh /usr/local/bin/docker-app-entrypoint
 RUN chmod +x /usr/local/bin/docker-app-entrypoint