Merge branch 'remove-ci' into 'master'

.gitlab-ci.yml

README.md

deprecated/pica-mail-copy-certs/Dockerfile

deprecated/pica-mail-copy-certs/README.md

deprecated/pica-mail-copy-certs/update-certs-pica-mail.sh

doc/guide_bonnes_pratiques.md

doc/guide_deploiement.md

doc/guide_developpeur_ci.md

doc/guide_utilisateur_ci.md

doc/images/clair_log_1.png

doc/images/clair_log_2.png

doc/launch_service.md

doc/mini_guide_cve.md

doc/new_service.md

doc/update_and_test.md

docker-compose/mail.yml

docker_test.sh

image_modified_last_commit.sh

meta-registry-test/Dockerfile

meta-registry-test/README.md