ci: deploy demo automatically

.github/workflows/deploy-demo.yml

@@ -0,0 +1,41 @@
+name: Deploy Demo to Cloudflare Pages
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "apps/demo/**"
+      - "apps/web/**"
+      - "packages/shared/**"
+      - "package.json"
+      - "pnpm-lock.yaml"
+      - "pnpm-workspace.yaml"
+      - "turbo.json"
+      - "tsconfig.base.json"
+      - ".github/actions/setup/**"
+      - ".github/workflows/deploy-demo.yml"
+  workflow_dispatch:
+
+concurrency:
+  group: deploy-demo
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  deploy:
+    name: Deploy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+      - uses: ./.github/actions/setup
+
+      - name: Build Demo
+        run: pnpm --filter @snapotter/demo build
+
+      - name: Deploy to Cloudflare Pages
+        run: npx wrangler pages deploy apps/demo/dist --project-name snapotter-demo --branch main --commit-dirty=true
+        env:
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}