[ci] deploy docs preview using gh actions

.github/workflows/docs-publish.yml

@@ -0,0 +1,55 @@
+name: Deploy documentation
+
+on:
+  push:
+    branches: ["docs-rewrite"]
+
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      # setup
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20.x
+
+      - name: Install deps
+        run: |
+          npm install -g pnpm
+          pnpm i --frozen-lockfile
+
+      # build
+      - name: Build docs
+        run: |
+          cd packages/shelter-docs
+          pnpm build
+          cd ../..
+
+      # deploy
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload dist folder
+          path: 'packages/shelter-docs/docs/.vitepress/dist'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4