Where is vue-ssr-client-manifest.json in Nuxt.JS?

Hello, I am using Vue.js and want to migrate to Nuxt.JS.
But, I have a question about the way to SSR.
Currently, I use VueServerRenderer.createBundleRenderer to create renderer.
However, I do not know how to do with Nuxt.JS since vue-ssr-server-bundle.json was not produced by npm run build.
The reason why it is important is that I use S3 to store bundled files and retrieve those and render to html.

Source code of my server side:

const fs = require('fs-extra')
const VueServerRenderer = require('vue-server-renderer')
const compression = require('compression')
const aws = require('aws-sdk')
const s3 = new aws.S3()

const { directive: t } = require('@intlify/vue-i18n-extensions')

const express = require('express')
const router = express.Router()

router.use(compression())
const bucket = 'Bucket Name'

getObject = key =>
  s3.getObject({ Bucket: bucket, Key: key }).promise()
const renderer = {
  template: null,
  serverBundle: null,
  clientManifest: null,
  renderer: null,
  async renderToString(ctx) {
    if (!this.template) {
      this.template = await fs.readFile('./templates/index.template.html', {
        encoding: 'utf-8'
      })
    }
    if (!this.serverBundle)
      this.serverBundle = JSON.parse(
        (await getObject('dist/vue-ssr-server-bundle.json')).Body.toString()
      )
    if (!this.clientManifest)
      this.clientManifest = JSON.parse(
        (await getObject('dist/vue-ssr-client-manifest.json')).Body.toString()
      )
    if (!this.renderer)
      this.renderer = VueServerRenderer.createBundleRenderer(
        this.serverBundle,
        {
          template: this.template,
          clientManifest: this.clientManifest,
          directives: { t }
        }
      )

    const html = await this.renderer.renderToString(ctx)
    return html
  }
}

router.get('*', (req, res) => {
  const ctx = { url: req.url }
  console.log(ctx)

  renderer
    .renderToString(ctx)
    .then(html => res.type('text/html').end(html))
    .catch(err =>
      err.code === 404
        ? res.status(404).end('Page not found')
        : res.status(500).end(err + '')
    )
})

module.exports = router