Add 404 redirect handling and GitHub Pages workflow configuration

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+name: gh-pages
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  gh-pages:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 21.x
+
+      - name: Install pnpm
+        run: npm install --global pnpm
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Build Vite
+        run: pnpm build
+
+      - name: Deploy GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: dist