add docs page

.github/workflows/docs.yaml

@@ -0,0 +1,37 @@
+name: Generate Docs
+
+on:
+  push:
+    paths:
+      - docs/**
+      - .github/workflows/docs.yaml
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v2
+        with:
+          hugo-version: "0.147.7"
+          extended: true
+
+      - name: Setup Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: "16.x"
+
+      - run: |
+          cd docs
+          npm i
+          npm run build
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/public
+          publish_branch: docs