Upload test coverage reports to Codecov in GitHub Actions workflow

Author: starichkov

.github/workflows/node.js.yml

@@ -30,3 +30,11 @@ jobs:
     - run: npm run build --if-present
     - name: Run tests with coverage
       run: npm run test:coverage
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: ./coverage/lcov.info
+        flags: unittests
+        name: codecov
+        fail_ci_if_error: true