[setup][m]: created basis for mocks and config module.

- Added minimal mock for 'package_search' CKAN API.
- 'config' module is based on frontend-v2.

package.json

@@ -21,7 +21,10 @@
     "@types/jest": "^25.2.3",
     "@types/react": "^16.9.35",
     "babel-jest": "^26.0.1",
+    "dotenv": "^8.2.0",
     "jest": "^26.0.1",
+    "nconf": "^0.10.0",
+    "nock": "^12.0.3",
     "postcss-preset-env": "^6.7.0",
     "react-test-renderer": "^16.13.1",
     "tailwindcss": "^1.4.6",