ci: add GitHub Actions deploy workflow

Author: coder-ralph

.github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: Deploy
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+ 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Vercel CLI
+        run: npm install --global vercel@latest
+
+      - name: Deploy to Vercel
+        run: vercel --prod --token=${{ secrets.VERCEL_TOKEN }}