added deploy script

.github/workflows/deploy.yml

@@ -0,0 +1,29 @@
+name: Deploy
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+jobs:
+  build_test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x] 
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: build
+        run: |
+          npm i
+          CI=false npm run build
+      - name: deploy to gh-pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          personal_token: ${{ secrets.TOKEN }}
+          publish_dir: ./build