Update .gitlab-ci.yml

.gitlab-ci.yml

-image: continuumio/miniconda3:latest
-
-before_script:
-  - conda env create -f environment.yml
-  - conda init bash
-  - source activate basepy39
-  - python -m ipykernel install --name basepy39 --display-name "basepy39"
-
 pages:
   stage: deploy
   script:
-    - pip install git+git://gricad-gitlab.univ-grenoble-alpes.fr/mecaiceige/tools/lib_python/xarray_aita.git
-    - pip install git+git://gricad-gitlab.univ-grenoble-alpes.fr/mecaiceige/tools/lib_python/xarray_uvecs.git
-    - pip install jupyter-book
-    - jupyter-book build .
-    - mv _build/html/ public
+    - mkdir .public
+    - cp -r _build/html/. .public
+    - mv .public public
   artifacts:
     paths:
       - public