Description:
This is document suggestion for Quay 3.3 new feature "Log exporter".

After reviewing the following doc PR, here're two suggestions, pls review.

https://github.com/quay/quay-docs/pull/46

#1: suggest give user examples what's the response looks like when give callback URL to receive the export logs of Quay, as the following:

{ "status": "success", "exported_data_url": "https://quay0506.storage.googleapis.com/datastoragegcp/registry/exportedactionlogs/33fcf27d-ffd0-422e-aa6c-46c4901801cb-5851f684-b81e-4f40-ac38-6830faf6ef6d?Signature=E%2FiFlMIgIQs%2F1RpX7hcz7dZuTeg%3D&Expires=1588752681&GoogleAccessId=GOOGDBV7HWZ4HGHR76DP6LJI", "repository": "demo", "start_time": "04/29/2020", "namespace": "ceos", "end_time": "05/07/2020", "export_id": "33fcf27d-ffd0-422e-aa6c-46c4901801cb" }

#2: When users provide the callback URL, and click button "Start export logs", user will see pop up with message like "Usage logs export queued with ID 9e3e271f-61c4-4acc-8ff6-50be3a4ac1b5", then users can use this ID to find the responding request and get the exported_data_url