tsconfig.server.json5

{
  "extends": "./tsconfig.app.json",
  "compilerOptions": {
    "outDir": "../out-tsc/server",
    /* For now, Node only understand CommonJS modules, so you can't stick to es2015 here */
    "module": "commonjs"
  },
  "exclude": [
    "test.ts",
    "**/*.spec.ts"
  ],
  /* Additional informations to bootstrap Angular */
  "angularCompilerOptions": {
    "entryModule": "app/app-server.module#AppServerModule"
  }
}