diff --git a/README.md b/README.md
index 9771591..572c4c3 100644
--- a/README.md
+++ b/README.md
@@ -164,6 +164,24 @@ Kiwix-build.py will create several directories:
 If you want to install all those directories elsewhere, you can pass the
 `--working-dir` option to `kiwix-build`:
 
+CI/CD containerised environments
+--------------------------------
+
+Beside the `kiwix-build` command line tool, Kiwix Build proposes
+[prepared compilation environments for multiple GNU/Linux
+systems](.github/ci_images/) too.
+
+These prepared environments include: compilers, binary toolchains and
+any third-party tool necessary to run the compilation toolchain. They
+don't contain pre-compiled library dependences build by kiwix-build, (like Xapian, Libicu,
+Libmicrohttps, ...) but it contains dependencies installed with package manager.
+
+These container images are necessary and intended to be used by Kiwix
+itself in many of its CI. But they are free to download et can be
+reused, although they can break anytime, therefore at your won risk.
+You can find them on [Docker
+Hub](https://hub.docker.com/r/kiwix/kiwix-build_ci).
+
 Troubleshooting
 ---------------