Add website deployment step

.github/workflows/build.yaml

@@ -58,3 +58,24 @@ jobs:
       with:
         path: build/build-*.zip
         if-no-files-found: error
+
+  website-deploy:
+    needs: build
+    if: ${{ github.ref == 'refs/heads/main' }}
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    # Specify runner + deployment step
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2 # or the latest "vX.X.X" version tag for this action