Demo cannot connect to WebSockets

[jhvanderven]

I am probably missing something very simple, but when I run the demo, the browser's developers tools console is full with messages that a connection to localhost:5000/collaboration/increment is failing.

I open Visual Studio, set Demo as the startup project and press F5.
Next I go to Visual Studio Code, navigate to Demo/Client and execute npm run dev in the terminal.

Then I navigate to localhost:5173 in Chrome and open the increment page.

I do the same with Firefox.

There is no sync.

Another Chrome tab or Chrome incognito window does sync.

What am I missing? What I do not understand anyway is why the port seems to be defined on the client (vite app) and not on the server (C# app). Perhaps this can be explained a bit better in the readme?