fix: add max children in docker file

Dockerfile

@@ -7,6 +7,7 @@ RUN apt install -y sendmail libpng-dev
 RUN docker-php-ext-install gd
 
 RUN printf 'upload_max_filesize=130M;\npost_max_size=130M;\nmax_execution_time=600;\nmax_input_time=600;\n' >> /usr/local/etc/php/conf.d/docker-php-memlimit.ini;
+RUN echo 'pm.max_children = 100' >> /usr/local/etc/php-fpm.d/zz-docker.conf
 
 COPY database /var/www/database