gitlab: add CONTRIBUTING.rst file to indicate use of merge requests

With the introduction of automated CI pipelines, we are now ready to switch
to using merge requests for the project. With this switch we longer wish
to have patches sent to the mailing list, and thus the git-publish
config is removed.

Reviewed-by: Andrea Bolognani <[email protected]>
Signed-off-by: Daniel P. Berrangé <[email protected]>

Author: berrange

.gitpublish

@@ -0,0 +1,28 @@
+============================
+Contributing to libvirt-dbus
+============================
+
+The libvirt DBus API binding accepts code contributions via merge requests
+on the GitLab project:
+
+https://gitlab.com/libvirt/libvirt-dbus/-/merge_requests
+
+It is required that automated CI pipelines succeed before a merge request
+will be accepted. The global pipeline status for the ``master`` branch is
+visible at:
+
+https://gitlab.com/libvirt/libvirt-dbus/pipelines
+
+CI pipeline results for merge requests will be visible via the contributors'
+own private repository fork:
+
+https://gitlab.com/yourusername/libvirt-dbus/pipelines
+
+Contributions submitted to the project must be in compliance with the
+Developer Certificate of Origin Version 1.1. This is documented at:
+
+https://developercertificate.org/
+
+To indicate compliance, each commit in a series must have a "Signed-off-by"
+tag with the submitter's name and email address. This can be added by passing
+the ``-s`` flag to ``git commit`` when creating the patches.