build: add github pages deploy action (#8582)

.github/workflows/gh-pages.yml

@@ -0,0 +1,20 @@
+name: Build and Deploy Site
+on: [push]
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v2
+
+      - name: Install and Build
+        run: |
+          yarn
+          yarn release:site
+
+      - name: Deploy 🚀
+        uses: JamesIves/github-pages-deploy-action@4
+        with:
+          branch: gh-pages
+          folder: site
+          target-folder: v3