2 errors on Using Red Hat Quy: 

 
https://access.redhat.com/documentation/en-us/red_hat_quay/3.8/html/use_red_hat_quay/quay-as-cache-proxy - i found two issues on this page: * Caching of entire upstream registries or just a single namespace, for example, all of {}docker.io or just {}docker.io/library.

there shouldn't be \

image: cache-proxy-staleness-pull.png[Staleness pull overview]