message: fixed app installation
diff: "options": {
  "outputPath": "dist/frontend",
  "index": "src/index.html",
  - "polyfills": ["zone.js", "zone.js/testing"],
  + "main": "src/main.ts",
  + "polyfills": "src/polyfills.ts",
  "tsConfig": "src/tsconfig.app.json",
  - "assets": [
  - "src/assets"
  - ],
  + "assets": ["src/assets"],
  "styles": [
  "src/styles.scss",
  "node_modules/material-icons/iconfont/material-icons.scss",
  "polyfills": "src/polyfills.ts",
  "tsConfig": "src/tsconfig.spec.json",
  "karmaConfig": "src/karma.conf.js",
  - "styles": [
  - "src/styles.scss"
  - ],
  + "styles": ["src/styles.scss"],
  "scripts": [],
  - "assets": [
  - "src/assets"
  - ],
  + "assets": ["src/assets"],
  "codeCoverage": true,
  - "codeCoverageExclude": [
  - "src/hacking-instructor/**/*.ts"
  - ]
  + "codeCoverageExclude": ["src/hacking-instructor/**/*.ts"]
  }
  },
  "lint": {
  