Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -18,3 +18,17 @@ run_tests:
         - coverage run -m pytest
         - coverage report
     coverage: '/TOTAL.*\s+(\d+\%)/'
+
+pages:
+    stage: deploy
+    before_script:
+        - echo "$CI_BUILDS_DIR"
+        - source /home/gitlab-runner/miniconda3/bin/activate cristallina
+    script:
+        - tox -e docs
+    artifacts:
+        paths:
+        - public
+    rules:
+    - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH
+