ci: add gitlab ci pipeline for build and deploy

.gitlab-ci.yml

@@ -0,0 +1,37 @@
+workflow:
+  rules:
+    - if: $CI_COMMIT_BRANCH == "main"
+
+stages:
+  - build
+  - deploy
+
+build:
+  stage: build
+  image: node:24.15-trixie-slim
+  before_script:
+    - corepack enable
+    - corepack prepare pnpm@latest --activate
+    - pnpm config set store-dir .pnpm-store
+  script:
+    - pnpm install --frozen-lockfile
+    - pnpm build
+  artifacts:
+    paths:
+      - doc_build/
+
+deploy:
+  stage: deploy
+  image: alpine:latest
+  needs:
+    - build
+  before_script:
+    - apk add --no-cache openssh-client rsync
+    - mkdir -p ~/.ssh
+    - echo "$SSH_PRIVATE_KEY" > ~/.ssh/id_ed25519
+    - chmod 600 ~/.ssh/id_ed25519
+    - ssh-keyscan -H onixbyte.cn >> ~/.ssh/known_hosts
+  script:
+    - rsync -avz --delete doc_build/ ${SSH_USER}@onixbyte.cn:${DEPLOY_PATH}
+  rules:
+    - if: $CI_COMMIT_BRANCH == "main"