How to Set Multiple Base Paths in index.ts in LoopBack 4

[Rudecruels]

In my loopback4 application I already have a basepath that set in the index.ts

import { ApplicationConfig, ApiApplication } from "./application";

export * from "./application";
export async function main(options: ApplicationConfig = {}) {
  const app = new ApiApplication(options);
  await app.boot();
  await app.start();
  const url = app.restServer.url;
  console.log(`Server is running at ${url}`);
  console.log(`Try ${url}/ping`);

  return app;
}
const version = "v1";
if (require.main === module) {
  const config = {
    rest: {
      basePath: "/api/" + version,
      port: +(process.env.PORT ?? 3001),
      host: process.env.HOST,
      gracePeriodForClose: 5000, // 5 seconds
      openApiSpec: {
        setServersFromRequest: true
      }
    }
  };
  main(config).catch((err) => {
    console.error("Cannot start the application.", err);
    process.exit(1);
  });
}

When requesting the endpoint start with /api/vi will enter into the application.
I want to add another base path like /files to enter the application.
Both basepath have different purpose.
NB: I have implemented the same approach in loopback 3 , but comming to loopback4 I didn't get the idea to do that