feat(plataform-express): replace any return type on #listen with Server

packages/platform-express/adapters/express-adapter.ts

@@ -1,3 +1,4 @@
+import type { Server } from 'net';
 import {
   InternalServerErrorException,
   Logger,
@@ -127,9 +128,13 @@ export class ExpressAdapter extends AbstractHttpAdapter {
     return response.set(name, value);
   }
 
-  public listen(port: string | number, callback?: () => void);
-  public listen(port: string | number, hostname: string, callback?: () => void);
-  public listen(port: any, ...args: any[]) {
+  public listen(port: string | number, callback?: () => void): Server;
+  public listen(
+    port: string | number,
+    hostname: string,
+    callback?: () => void,
+  ): Server;
+  public listen(port: any, ...args: any[]): Server {
     return this.httpServer.listen(port, ...args);
   }
 

packages/platform-express/interfaces/nest-express-application.interface.ts

@@ -1,3 +1,4 @@
+import { Server } from 'net';
 import { INestApplication } from '@nestjs/common';
 import { ServeStaticOptions } from './serve-static-options.interface';
 
@@ -9,6 +10,21 @@ import { ServeStaticOptions } from './serve-static-options.interface';
  * @publicApi
  */
 export interface NestExpressApplication extends INestApplication {
+  /**
+   * Starts the application.
+   *
+   * @param {number|string} port
+   * @param {string} [hostname]
+   * @param {Function} [callback] Optional callback
+   * @returns {Promise} A Promise that, when resolved, is a reference to the underlying HttpServer.
+   */
+  listen(port: number | string, callback?: () => void): Promise<Server>;
+  listen(
+    port: number | string,
+    hostname: string,
+    callback?: () => void,
+  ): Promise<Server>;
+
   /**
    * A wrapper function around native `express.set()` method.
    *