Adding stub CI pages

.gitlab-ci.yml

+stages:
+  - build
+  - deploy
+
+variables:
+  PAGES: $CI_PROJECT_DIR/public
+
+before_script:
+  - pip install jupyter nbconvert
+
+build_notebooks:
+  stage: build
+  script:
+    - mkdir -p $PAGES
+    - jupyter nbconvert --to html notebooks/*.ipynb --output-dir=$PAGES
+
+pages:
+  stage: deploy
+  script:
+    - mkdir -p public
+    - cp -r $PAGES/* public
+  artifacts:
+    paths:
+      - public
+  only:
+    - main