feat: allow to run in localhost

[hideokamoto]

Expect behavior

Run the application in local

Actual Behavior

When running the example application in the localhost, the navigator.credentials.create method will throw these errors.

The relying party ID is not a registrable domain suffix of, nor equal to the current domain.

Solution

The credOptions.rp.id should be localhost, but the code will send localhost:8080.
So we need to check the id and replace it.

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