Angular 5 with Universal and TransferState: tsconfig.server.json & angular-cli.json

0-tsconfig.server.json

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    "outDir": "../out-tsc/app",
    "baseUrl": "./",
    "module": "commonjs",
    "types": []
  },
  "exclude": [
    "test.ts",
    "**/*.spec.ts",
    "server.ts"
  ],
  "angularCompilerOptions": {
    "entryModule": "app/app.server.module#AppServerModule"
  }
}

1-tsconfig.app.json

{
  ...
  "exclude": [
    "test.ts",
    "**/*.spec.ts",
    "server.ts"
  ]
}

2-.angular-cli.json

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "project": {
    "name": "angular-universal-example"
  },
  "apps": [{
      "root": "src",
      "outDir": "dist/browser",
      ...
    },
    {
      "root": "src",
      "outDir": "dist/server",
      "assets": [],
      "platform": "server",
      "index": "index.html",
      "main": "main.server.ts",
      "test": "test.ts",
      "tsconfig": "tsconfig.server.json",
      "testTsconfig": "tsconfig.spec.json",
      "prefix": "app",
      "scripts": [],
      "environmentSource": "environments/environment.ts",
      "environments": {
        "dev": "environments/environment.ts",
        "prod": "environments/environment.prod.ts"
      }
    }
  ],
  ...
}