ci: add GitHub Actions deployment

.github/workflows/deploy.yml

@@ -0,0 +1,44 @@
+name: Deploy
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency:
+  group: production-deploy
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+jobs:
+  deploy:
+    name: Deploy to Cloudflare
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    env:
+      CLOUDFLARE_ACCOUNT_ID: ${{ vars.CLOUDFLARE_ACCOUNT_ID }}
+      CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.12.0
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check project
+        run: npm run check
+
+      - name: Apply D1 migrations
+        run: npx wrangler d1 migrations apply DB --remote
+
+      - name: Deploy Worker
+        run: npm run deploy