ci: add GitHub Pages deploy workflow

ddiff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
nnew file mode 100644
iindex 0000000..63d3424
---- /dev/null
++++ b/.github/workflows/deploy.yml
@@@ -0,0 +1,40 @@
++name: Deploy to GitHub Pages
++
++on:
++  push:
++    branches: [main]
++  workflow_dispatch:
++
++permissions:
++  contents: read
++  pages: write
++  id-token: write
++
++concurrency:
++  group: pages
++  cancel-in-progress: false
++
++jobs:
++  build:
++    runs-on: ubuntu-latest
++    steps:
++      - uses: actions/checkout@v4
++      - uses: actions/setup-node@v4
++        with:
++          node-version: 20
++          cache: npm
++      - run: npm ci
++      - run: npm run build
++      - uses: actions/upload-pages-artifact@v3
++        with:
++          path: dist/
++
++  deploy:
++    needs: build
++    runs-on: ubuntu-latest
++    environment:
++      name: github-pages
++      url: ${{ steps.deploy.outputs.page_url }}
++    steps:
++      - id: deploy
++        uses: actions/deploy-pages@v4