ci: Add yaml file for CI

The actual CI run docusaurus generation.

.gitlab-ci.yml

+image: node:current-alpine3.20
+
+
+
+
+pages:
+  stage: deploy
+  script:
+    - cd docwebsite
+    - npm install --force
+    - npm run build
+    - mv ./build ../public
+  artifacts:
+    paths:
+    - public