Add installation and releasenotes sections to the user manual.

.gitlab-ci.yml

@@ -8,25 +8,34 @@ cache:
     - "$CI_PROJECT_DIR/pip-cache"
   key: "$CI_PROJECT_ID"
 
+.install_sphinx:
+  before_script:
+  - pip install -U sphinx
+  - pip install -U sphinx-theme-pd
+  - pip install -U reno[sphinx]
+
+
 test-docs:
   stage: test
+  extends:
+  - .install_sphinx
   script:
-  - pip install -U sphinx
-  - pip install -U sphinx-theme-pd
-  - sphinx-build -b html docs public
+  - sphinx-build -b html docs userdocs
+  artifacts:
+    paths:
+    - userdocs
   only:
   - branches
-  except:
-  - main
 
-pages:
+deploy:
   stage: deploy
+  extends:
+  - .install_sphinx
   script:
-  - pip install -U sphinx
-  - pip install -U sphinx-theme-pd
   - sphinx-build -b html docs public
   artifacts:
     paths:
     - public
   only:
-  - main
+  - tags
+