Migrate to Vite on standalone app

.github/workflows/e2e-standalone-tests.yml

@@ -42,7 +42,10 @@ jobs:
           python -m pip install --progress-bar off pytest-playwright==0.4.3  # next version is flaky
 
       - name: Build standalone_app
-        run: make MODE="prd" standalone_app/public/bundle.js
+        working-directory: standalone_app
+        run: |
+          npm install
+          npx vite build --outDir dist
 
       - name: Install the required browsers
         run: playwright install

.github/workflows/gh-pages.yml

@@ -31,15 +31,8 @@ jobs:
         with:
           node-version: '18'
       - name: Build standalone_app
-        env:
-          PUBLIC_PATH: /optuna-dashboard/public/
-        run: make MODE="prd" standalone_app/public/bundle.js
-      - name: Create publish directory
-        run: |
-          mkdir gh-publish
-          cp -r standalone_app/public gh-publish/public
-          cp standalone_app/favicon.ico gh-publish/favicon.ico
-          cp standalone_app/github-pages.html gh-publish/index.html
+        working-directory: standalone_app
+        run: npx vite build --base=/optuna-dashboard/public/ --outDir ../gh-pages
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v2
         with: