revert CI

.gitlab-ci.yml

@@ -107,16 +107,17 @@ deploy_zenodo:
     - tags
 
 
-image: alpine:latest
-
 pages:
-  stage: deploy_pages
-  script:
-    - mkdir -p public
-    - cp docs/redirect_index.html public/index.html
-  artifacts:
-    paths:
-    - public
-  only:
-  - master
+    stage: deploy_pages
+    image: ubuntu:latest
+    script:
+      - apt update --yes && apt install --yes pandoc pip
+      - pip install -U -r docs/doc_requirements.txt
+      - pip install .
+      - sphinx-build -b html docs public
+    artifacts:
+      paths:
+        - public
+    only:
+      - master