ci: Mention image layering in the README

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Matthias Clasen 2020-07-09 13:11:26 -04:00
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commit de8258171a

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@ -35,4 +35,13 @@ branch, as well as their available versions.
- [ ] Add the new job to `.gitlab-ci.yml` referencing the image
- [ ] Open a merge request with your changes and let it run
### Checklist for Adding a new dependency to a CI image
Our images are layered, and the base (called fedora-base) contains
all the rpm payload. Therefore, adding a new dependency is a 2-step
process:
1. [ ] Build and upload fedora-base:$version+1
1. [ ] Build and upload fedora:$version+1 based on fedora-base:version+1
[registry]: https://gitlab.gnome.org/GNOME/gtk/container_registry