add a gh action to auto-deploy

Author: jazzsequence

Diff for: .github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: Deploy
+on:
+  push:
+    branches:
+      - main
+permissions:
+  contents: write
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '16'
+          cache: 'npm'
+      - name: Install Dependencies
+        run: npm ci
+      - name: Build
+        run: npm run build
+      - name: Deploy to GitHub Pages
+        env:
+          CI: true
+        run: npm run deploy
+