boot.server.ts

import 'zone.js/dist/zone-node';
import './polyfills/server.polyfills';

import { enableProdMode } from '@angular/core';
import { createTransferScript, IEngineOptions, ngAspnetCoreEngine } from '@nguniversal/aspnetcore-engine';
import { createServerRenderer } from 'aspnet-prerendering';

// Grab the (Node) server-specific NgModule
import { AppModule } from './app/app.module.server';

enableProdMode();

export default createServerRenderer((params) => {

  // Platform-server provider configuration
  const setupOptions: IEngineOptions = {
    appSelector: '<app-root></app-root>',
    ngModule: AppModule,
    request: params,
    providers: [
      // Optional - Any other Server providers you want to pass
      // (remember you'll have to provide them for the Browser as well)
    ]
  };

  return ngAspnetCoreEngine(setupOptions).then(response => {

    // Apply your transferData to response.globals
    response.globals.transferData = createTransferScript({
      someData: 'Transfer this to the client on the window.TRANSFER_CACHE {} object',
      fromDotnet: params.data.thisCameFromDotNET // example of data coming from dotnet, in HomeController
    });

    return ({
      html: response.html, // our <app-root> serialized
      globals: response.globals // all of our styles/scripts/meta-tags/link-tags for aspnet to serve up
    });
  });
});