Add GitLab CI configuration for testing

.gitlab-ci.yml

@@ -0,0 +1,23 @@
+image: node:18
+
+stages:
+  - build
+
+cache:
+  paths:
+    - node_modules/
+
+before_script:
+  - npm ci
+  - npm install -g vitepress
+
+build-docs:
+  stage: build
+  script:
+    - npm run docs:build -- --host
+    - mv docs/.vitepress/dist public
+  artifacts:
+    paths:
+      - public
+  only:
+    - main