Spa Services running only react pages ?

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

We have a web application which runs on .NET 8 (recently we migrated from 5 to 8).
Now the team is planning to build new screens in ReactTS and merge these screens with the existing .NET 8 web application. So, it won't impact on the current customers. We also have a future plan to migrate the existing .NET web screens to React TS in phase wise manner

We are doing a POC with .NET Web APP and ReactTS sample apps we tried different [articles](https://esausilva.com/2020/08/03/add-a-react-app-to-a-dot-net-core-mvc-app/) and approaches to run .NET application and ReactTS application on the Same domain and port number.
Example .NET 8 web app is running on https://localhost:44341 and trying to run ReactTS also on same port and they both reside in same solution.

My solution look like

Do we have any documentation for this?

We are using

Startup we added like
` app.UseSpa(spa =>
{
spa.Options.SourcePath = "ClientApp";
spa.UseReactDevelopmentServer("start");
});`

We are using " Microsoft.AspNetCore.SpaServices.Extensions " package.

### Expected Behavior

We trying to run .NET 8 Web APP and ReactTS on same domain and port simply we are mixing .NET 8 and ReactTS so few screens will run on ReactTS and few screesn will run on .NET 8.

Our POC [here](https://github.com/itsmegopi/ReactWithNet8)

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

8

### Anything else?

_No response_