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 ## installing a jupyter minimal environment in singularityCE/apptainer
 
-CI produced registry image at registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter reused to produce singularity container (OCI)
+- Singularity_from_docker: CI produced registry image at registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter reused to produce singularity container (OCI)
+`singularity build Singularity_from_docker.sif Singularity_from_docker` (might need `sudo`)
+
+- Singularity: complete Singularity recipe for CI
+`singularity build Singularity.sif Singularity` (might need `sudo`)
 
 ## singularity conversion if you have singularityCE or apptainer installed
 ```