improve readme

README.md

 # Single page article presentation
 
-## Build existing pages
-
-With pandoc >= 2.14, `make` ; otherwise:
-
-```bash
-docker run --rm -v $PWD:/data -it memmos.laas.fr:5000/gepetto/articles make
-```
-
 ## Create your own
 
 You can use `cosyslam.md` as a template. Just copy it under a different `*.md` name, and replace what you want inside.
 
 ## Publish
 
-publication https://gepettoweb.laas.fr/articles/ is done via CI/CD on the main branch
+Publication https://gepettoweb.laas.fr/articles/ is done via gitlab CI/CD on the main branch
+
+## Build existing pages
+
+This is not mandatory, as gitlab CI/CD is doing all the required chores, but if you want to build things locallay:
+
+- with pandoc >= 2.14: `make`
+- otherwise: `docker run --rm -v $PWD:/data -it memmos.laas.fr:5000/gepetto/articles make`