Update CI

.gitlab-ci.yml

-variables:
-  CI_REPOSITORY_SSH_URL: git@git.opendatafrance.net:${CI_PROJECT_PATH}.git
-  SCHEMA_JSON: schema.json
-  SCHEMA_MD: schema.md
-
-build_schema_doc:
-  stage: build
-  image: node:10
-  only:
-    changes:
-      - $SCHEMA_JSON
-  variables:
-    LC_ALL: fr_FR.utf8
-  before_script:
-    - npm install @opendataschema/table-schema-to-markdown
-  script:
-    - npx table-schema-to-markdown $SCHEMA_JSON > $SCHEMA_MD
-  artifacts:
-    paths:
-      - $SCHEMA_MD
-  cache:
-    paths:
-      - node_modules/
-  tags:
-    - scdl
-
-commit_schema_md:
-  stage: deploy
-  image: git.opendatafrance.net:4567/scdl/documentation
-  only:
-    changes:
-      - $SCHEMA_JSON
-  before_script:
-    - eval $(ssh-agent -s)
-    - ssh-add <(echo "$SSH_PRIVATE_KEY")
-    - mkdir -p ~/.ssh
-    - ssh-keyscan -t rsa git.opendatafrance.net >> ~/.ssh/known_hosts
-    - git config --global user.email "table-schema-to-markdown"
-    - git config --global user.name "Table Schema to Markdown bot"
-  script:
-    - git clone --branch $CI_COMMIT_REF_NAME $CI_REPOSITORY_SSH_URL
-    - mv $SCHEMA_MD $CI_PROJECT_NAME
-    - cd $CI_PROJECT_NAME
-    - git add $SCHEMA_MD
-    - git commit -m "Update $SCHEMA_MD" || true
-    - git push
-  tags:
-    - scdl
+include:
+  - project: 'scdl/doc-generator'
+    ref: next
+    file: '.schema-gitlab-ci-template.yml'