[DockerImages] Add zend opcache

Author: Arminek

php/Dockerfile

@@ -11,6 +11,7 @@ RUN docker-php-ext-install exif
 RUN docker-php-ext-install fileinfo
 RUN docker-php-ext-install intl
 RUN docker-php-ext-install pdo_mysql
+RUN docker-php-ext-install opcache
 ENV PHP_DATE_TIMEZONE="Europe/Warsaw"
 COPY --from=composer /usr/bin/composer /usr/bin/composer
 WORKDIR /symfony