Set up deployment to GitHub Pages

.github/workflows/ci.yml

@@ -2,18 +2,20 @@ on:
   - pull_request
   - push
 jobs:
-  tests:
-    name: Tests
+  ci:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Set up Node
-        uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          cache: 'npm'
-          node-version: 16
-      - name: Install dependencies
-        run: npm install
-      - name: Run tests
-        run: npm run test
+          cache: npm
+          cache-dependency-path: package-lock.json
+          node-version: 20.x
+      - run: npm ci
+      - run: npm test
+      - run: npm run build
+        #if: github.ref == 'refs/heads/main'
+      - uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          folder: build
+        #if: github.ref == 'refs/heads/main'