Update docs/services/containers.md, docs/services/mirror.md

Closes LOS-1087

docs/services/containers.md

 # Containers
 
-Official documentation : <http://linux.web.cern.ch/linux/docs/dockerimages.shtml>
+If you want more in-depth documentation on CC7 (/CS8) docker images please follow this [link](http://linux.web.cern.ch/linux/docs/dockerimages.shtml).
 
-Linux support provides container, images are updated on a regularly basis.
-
-These images are built with koji.
+Linux support provides container, images are updated on a regularly basis. These images are built with koji. You can find more information in the following links:
+* [cc7](https://hub.docker.com/r/cern/cc7-base)
+* [alma8](https://hub.docker.com/r/cern/alma8-base)
+* [alma9](https://hub.docker.com/r/cern/alma9-base)
 
 ## Docker hub
 
@@ -14,6 +15,6 @@ Official images can be downloaded from <https://hub.docker.com/u/cern/>
 
 A local copy in gitlab can be also used:
 
- * <https://gitlab.cern.ch/linuxsupport/c8-base/container_registry>
  * <https://gitlab.cern.ch/linuxsupport/cc7-base/container_registry>
- * <https://gitlab.cern.ch/linuxsupport/slc6-base/container_registry>
+ * <https://gitlab.cern.ch/linuxsupport/alma8-base/container_registry>
+ * <https://gitlab.cern.ch/linuxsupport/alma8-base/container_registry>