add github actions

Author: MycroftWong

.github/workflows/deploy.yml

@@ -0,0 +1,21 @@
+name: Deploy Hugo to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v4
+        with:
+          go-version: "1.21"
+      - run: go install github.com/gohugoio/hugo@latest
+      - run: hugo -D
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./public