Add back lighthouse workflow but for template steps

.github/workflows/run-tests.yml

@@ -33,3 +33,19 @@ jobs:
       - name: Install workspace dependencies
         run: npm install
         working-directory: .
+
+      - name: Install dependencies
+        run: npm install
+        working-directory: templates/react-javascript
+
+      - name: lighthouse mobile audit
+        run: npm run lhci:mobile
+        working-directory: templates/react-javascript
+        env:
+            LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}
+
+      - name: lighthouse desktop audit
+        run: npm run lhci:desktop
+        working-directory: templates/react-javascript
+        env:
+            LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}

templates/react-javascript/lighthouserc.json

@@ -0,0 +1,17 @@
+{
+    "ci": {
+      "collect": {
+        "startServerCommand": "npm run build && npm start",
+        "url": ["http://localhost:3000/"],
+        "numberOfRuns": 3
+      },
+      "assert": {
+        "assertions": {
+          "categories:accessibility": ["error", { "minScore": 0.1 }]
+        }
+      },
+      "upload": {
+        "target": "temporary-public-storage"
+      }
+    }
+  }