diff --git a/gitlab-runner_config_example/docker/etc/gitlab-runner/config.toml b/gitlab-runner_config_example/docker/etc/gitlab-runner/config.toml
index 09c4f18..2f55c93 100644
--- a/gitlab-runner_config_example/docker/etc/gitlab-runner/config.toml
+++ b/gitlab-runner_config_example/docker/etc/gitlab-runner/config.toml
@@ -25,6 +25,7 @@ check_interval = 0
     oom_kill_disable = false
     disable_cache = false
     volumes = ["/home/admin/pelican-themes/:/themes", "/var/www/webapp_doohoyi/nosignal.hopto.org_site/ci:/site-public:rw"]
+    # above is important, --> https://stackoverflow.com/a/38099850
     shm_size = 0
     network_mode = "host" # check your network name with 'docker network ls' --> https://stackoverflow.com/a/50461875
   [runners.cache]