Install pcntl extension

Author: ihor-sviziev

php/7.2-fpm/Dockerfile

@@ -27,6 +27,7 @@ RUN docker-php-ext-install \
   intl \
   mbstring \
   opcache \
+  pcntl \
   pdo_mysql \
   soap \
   xsl \
@@ -74,4 +75,4 @@ EXPOSE 9001
 COPY ./docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
 
 ENTRYPOINT [ "docker-entrypoint.sh" ]
-CMD [ "php-fpm" ]
+CMD [ "php-fpm" ]