title: How to get server Timestamp from firebase v9?
body: <p>Please, I need your help to get the server timestamp from <strong>Firebase version 9</strong>.</p>
  <p>I've tried to follow the same approach as for Firebase v8 : <code>firebase.firestore.FieldValue.serverTimeStamp()</code> but didn't work for version 9.</p>
  <p>Is there any way to do the same thing in Firebase version 9 ?</p>