Rate limit in staging so we can utilize fail to ban later

Copy catalog configuration in nginx to our pdc discovery staging nginx configuration Burst is set to 80 for all the images, but we may want to set this higher or lower for pdc discovery How many request are for a set of files? Is one per second enough... This requires experimentation in our system

Completion criteria:

[ ] Copy the catalog configuration from the catalog and see if the pages load
[ ] We need to figure out what the user sees when they ask for more than the 80. Set the limit to a low number and document what happens
[ ] Create an ADR documenting what the user will see when we implement rate limiting in production.
[ ] NO rate limiting should be done in production with this ticket. This is a staging experiment only

pulibrary / pdc_discovery

Rate limit in staging so we can utilize fail to ban later #607