[PATCH 3/9] gitlab-ci: Document how forks can use different set of jobs

[Philippe Mathieu-Daudé]

Document how forks can use different set of jobs and add
a big warning so no new configuration is added to this
file.

Suggested-by: Daniel Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 .gitlab-ci.yml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 533a7e61339..8c843e5f20e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,2 +1,16 @@
+#
+# This is the GitLab CI configuration file for the mainstream QEMU
+# project: https://gitlab.com/qemu-project/qemu/-/pipelines
+#
+# !!! DO NOT ADD ANY NEW CONFIGURATION TO THIS FILE !!!
+#
+# Only documentation or comments is accepted.
+#
+# To use a different set of jobs than the mainstream QEMU project,
+# you need to use the "custom CI/CD configuration path" option in
+# your GitLab CI namespace setting and set it to option and set the
+# location of your custom .gitlab-ci.yml:
+# 
https://docs.gitlab.com/ee/ci/pipelines/settings.html#custom-cicd-configuration-path
+#
 include:
   - local: '/.gitlab-ci.d/qemu-project.yml'
-- 
2.26.3