1. 首先需要安装 @angular/platform-server 和 @nguniversal/express-engine 包。在项目根目录下执行以下命令：

npm i @angular/platform-server @nguniversal/express-engine

2. 然后，在 app.module.ts 中引入 ServerModule 并为其添加 providers 配置项：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ServerModule } from '@angular/platform-server';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule.withServerTransition({ appId: 'my-app' }), ServerModule],
  providers: [
    {
      provide: 'SERVER_URL',
      useValue: 'http://localhost:4000', // 服务器 URL 地址
    },
  ],
  bootstrap: [AppComponent],
})
export class AppModule {}

3. 针对express适配器，我们需要在server.ts中指定HttpAdapter，如下所示：

import 'zone.js/dist/zone-node';
import 'reflect-metadata';
import { enableProdMode } from '@angular/core';
import { renderModuleFactory } from '@angular/platform-server';
import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';
import * as express from 'express';
import {join} from 'path';
import * as compression from 'compression';

enableProdMode();

const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main');

const app = express();
const port = process.env.PORT || 4000;

const DIST_FOLDER = join(process.cwd(), 'dist/my-app/browser');

app.use(compression());

app.get('*.*', express.static(DIST_FOLDER, {
  maxAge: '1y'
}));

app.get('*', (req, res) => {
  res.render('index', { req });
});

renderModuleFactory(AppServerModuleNgFactory, {
  document: indexHtml,
  url: req.url,
  extraProviders: [
    provideModuleMap(LAZY_MODULE_MAP),
    { provide: 'SERVER_URL', useValue: `http://localhost:${port}` }
  ]
}).then(html => {
  res.status(200