add deploy workflow

.github/workflows/deploy.yml

@@ -0,0 +1,26 @@
+name: Deploy to GH Pages
+
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  gh-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@master
+      - name: Setup
+        uses: actions/setup-node@master
+      - name: Install deps
+        run: npm install
+      - name: Build
+        run: npm run build
+      - name: Deploy
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          folder: build