Updated the files.

my-app/node_modules/http-proxy-middleware/dist/http-proxy-middleware.d.ts

@@ -0,0 +1,35 @@
+import type { Filter, RequestHandler, Options } from './types';
+export declare class HttpProxyMiddleware {
+    private logger;
+    private config;
+    private wsInternalSubscribed;
+    private serverOnCloseSubscribed;
+    private proxyOptions;
+    private proxy;
+    private pathRewriter;
+    constructor(context: Filter | Options, opts?: Options);
+    middleware: RequestHandler;
+    private catchUpgradeRequest;
+    private handleUpgrade;
+    /**
+     * Determine whether request should be proxied.
+     *
+     * @private
+     * @param  {String} context [description]
+     * @param  {Object} req     [description]
+     * @return {Boolean}
+     */
+    private shouldProxy;
+    /**
+     * Apply option.router and option.pathRewrite
+     * Order matters:
+     *    Router uses original path for routing;
+     *    NOT the modified path, after it has been rewritten by pathRewrite
+     * @param {Object} req
+     * @return {Object} proxy options
+     */
+    private prepareProxyRequest;
+    private applyRouter;
+    private applyPathRewrite;
+    private logError;
+}