added gh actions for deploying to gh pages

.github/workflows/ghp-deploy.yaml

@@ -0,0 +1,28 @@
+name: "ghp-deploy"
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build
+        run: npm run build
+
+      - name: Deploy
+        run: npm run ghp-deploy