update template and not generated file

Signed-off-by: Thomas Clavier <tom@tcweb.org>

Author: tclavier

Dockerfile-debian.template

@@ -19,6 +19,7 @@ RUN set -ex; \
 # see https://docs.nextcloud.com/server/stable/admin_manual/installation/source_installation.html
 ENV PHP_MEMORY_LIMIT 512M
 ENV PHP_UPLOAD_LIMIT 512M
+ENV PHP_PM_MAX_CHILDREN 16
 RUN set -ex; \
     \
     savedAptMark="$(apt-mark showmanual)"; \
@@ -106,6 +107,7 @@ RUN { \
         echo 'memory_limit=${PHP_MEMORY_LIMIT}'; \
         echo 'upload_max_filesize=${PHP_UPLOAD_LIMIT}'; \
         echo 'post_max_size=${PHP_UPLOAD_LIMIT}'; \
+        echo 'pm.max_children = ${PHP_PM_MAX_CHILDREN}'; \
     } > "${PHP_INI_DIR}/conf.d/nextcloud.ini"; \
     \
     mkdir /var/www/data; \