Add github page deploy action

.github/workflows/gh-pages.yaml

@@ -0,0 +1,33 @@
+name: GitHub Pages
+on:
+  push:
+    tags:
+      - v*
+permissions:
+  contents: write
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: "1.x"
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Test
+        run: go test -race ./...
+        working-directory: ./demo
+      - name: Build
+        run: |
+          GOARCH=wasm GOOS=js go build -o dist/web/app.wasm
+          go run main.go -ssg=dist -prefix=budoux-go
+        working-directory: ./demo
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./demo/dist
+          force_orphan: true