feat(node-server): Pass options to the CORS middleware via corsOptions

Author: offirgolan

docs/node-server/overview.md

@@ -83,6 +83,22 @@ new Server({
 });
 ```
 
+### corsOptions
+
+_Type_: `Object | Function`
+_Default_: `undefined`
+
+Options passed to the ([CORS](https://github.com/expressjs/cors)) middleware.
+
+```js
+new Server({
+  corsOptions: {
+    origin: 'http://localhost:4000',
+    credentials: true
+  }
+});
+```
+
 ## API Configuration
 
 ### recordingsDir

packages/@pollyjs/node-server/src/server.js

@@ -12,7 +12,7 @@ export default class Server {
   constructor(config = {}) {
     this.config = { ...DefaultConfig, ...config };
     this.app = express();
-    this.app.use(cors());
+    this.app.use(cors(this.config.corsOptions));
 
     if (!this.config.quiet) {
       this.app.use(morgan('dev'));