It's 2022

.github/workflows/deploy-gh-pages.yml

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+name: Deploy GitHub Pages
+
+on:
+  push:
+    branches:
+      - react-src
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '16'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+      - name: Build and deploy
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git remote set-url origin https://git:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
+          npm run deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.prettierignore

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+# Ignore artifacts:
+build
+coverage
+
+README.md

.prettierrc.json

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+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}