[Docs]: tutorial failed on handle No Name record

[baijinping]

Describe what's incorrect/missing in the documentation

When following tutorial i failed on handle No Name record.

What i expected is

But i got this:

After some research, i think the bug is in src/contacts.js:

export async function getContact(id) {
    await fakeNetwork(`contact:${id}`)
    let contacts = await localforage.getItem('contacts')
    let contact = contacts.find((contact) => contact.id === id)
    return contact ?? null
}

the final line may replace by return contact ?? {}.

I hope this will be useful.