cache version

README.md

 ## installing a jupyter minimal environment in docker
 
-## CI produced registry image at registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter
+CI produced registry image at registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter
 
 ## singularity conversion if you have singularityCE or apptainer installed
 ```
@@ -15,3 +15,7 @@ apptainer build docker-miniconda3-jupyter.sif  docker://registry-gitlab.pasteur.
 apptainer exec -B /pasteur docker-miniconda3-jupyter.sif jupyter-lab  --no-browser
 ```
 
+## running from cache only:
+```
+singularity exec docker://registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter:main jupyter-lab  --no-browser
+```