Begin to remove CI

.gitlab-ci.yml

README.md

doc/mini_guide_cve.md

docker-compose/README.md

docker_test.sh

image_modified_last_commit.sh

meta-registry-test/Dockerfile

meta-registry-test/README.md

meta-registry-test/clair-whitelist.yml

meta-registry-test/docker-compose.yml

meta-registry-test/secrets/htpasswd.example

nextcloud-docker/README.md

pica-ci-base/Dockerfile

pica-db-backup-rotation/README.md

pica-db-backup-rotation/clair-whitelist.yml

pica-db-backup/README.md

pica-db-backup/clair-whitelist.yml

pica-dokuwiki/README.md

pica-dokuwiki/clair-whitelist.yml

pica-etherpad-db/README.md