Running React WebDevServer from .NET core SPA services cause websocket errors

Question

I've created a react project with react scripts.
When started directly with "npm run start", it listens by default to port: 3000.

Since I am running .NET Core Project as a backend server, I use the spa services to establish proxy like this:

app.UseSpa(spa =>
   {
       // To learn more about options for serving an Angular SPA from ASP.NET Core,
       // see https://go.microsoft.com/fwlink/?linkid=864501

       spa.Options.SourcePath = "../ClientApp";

       if (env.IsDevelopment())
       {
           spa.UseProxyToSpaDevelopmentServer("http://localhost:3000");
       }
    });

For hot reload, the client expects a websocket connection to the webdevserver, so it throws many errors like this:

WebSocketClient.js:16 WebSocket connection to 'wss://localhost:3000/ws' failed:

How to disable this hot reload for browser? or redirect websockets connection in the proxy?