Make `vite preview` error-tolerant when the default port is in use

Clear and concise description of the problem

It is said that the new AirPlay feature in macOS Monterey is using port 5000 and port 7000. https://developer.apple.com/forums/thread/682332.

In the current implementation, vite preview will straightly fail when port 5000 is in use. So it will fail by default in the new system.

Suggested solution

I don’t know if the default port of this new AirPlay feature will be changed in the future, as it’s not documented yet (in https://support.apple.com/en-us/HT202944). So I’m not proposing a change to the default port of vite preview.

But it should be error-tolerant. It should use the next available port when port 5000 is in use. It should still fail when the user specifies an unavailable port.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn’t already an issue that request the same feature to avoid creating a duplicate.

[ygj6]

Great, I will submit a PR as soon as possible.

[ygj6]

Coincidentally, I have a background service that also uses port 5050. If the port is occupied, it will automatically +1, which I think is very good. I am willing to contribute this feature.