[bug] Error on `rocket build` with a rollup plugin `TypeError: Cannot read properties of undefined (reading 'startsWith')`

[guillemcordoba]

Steps to reproduce:

1. Run npx @rocket/create@latest, select the documentation theme.
2. Cd into that folder and run npm install.
3. Install @rollup/plugin-json with npm i -D @rollup/plugin-json.
4. Change config/rocket.config.js, adding the rollup json plugin as stated in the documentation:

import json from '@rollup/plugin-json';
import { addPlugin } from 'plugins-manager';

/** @type {import('@rocket/cli').RocketCliOptions} */
export default {
  setupDevServerAndBuildPlugins: [addPlugin(json, { }, { location: 'top' })],
};

5. Run npm run build.

This is the error that shows up:

guillem@guillem-thinkpad:~/projects/lab/rocket-commonjs-plugin-repro$ npm run build

> rocket-docs-theme-launch@0.0.1 build
> rocket build

Engine building...
Generating Open Graph Images...
Optimize Production Build...
TypeError: Cannot read properties of undefined (reading 'startsWith')
    at Object.transform (/home/guillem/projects/lab/rocket-commonjs-plugin-repro/node_modules/@web/dev-server-rollup/dist/rollupAdapter.js:228:30)
    at file:///home/guillem/projects/lab/rocket-commonjs-plugin-repro/node_modules/rollup/dist/es/shared/rollup.js:22717:40 {
  code: 'PLUGIN_ERROR',
  plugin: 'json',
  hook: 'transform',
  id: '/home/guillem/projects/lab/rocket-commonjs-plugin-repro/_site-dev/inline-module-ad21fcfbb3d325880e51446273377108.js',
  watchFiles: [
    '/home/guillem/projects/lab/rocket-commonjs-plugin-repro/_site-dev/404.html',

Here is a reproduction repository: https://github.com/guillemcordoba/rocket-commonjs-plugin-repro