message: chore: add file-loader
diff: "eslint": "^5.8.0",
  "eslint-config-prettier": "^3.1.0",
  "eslint-plugin-node": "^8.0.0",
  + "file-loader": "^2.0.0",
  "jasmine-core": "^3.3.0",
  "jest": "^23.6.0",
  "npm-run-all": "^4.1.3",
  