Synchronize or support dependency proxy on Geo secondaries
Problem
Dependency proxy is available as part of GitLab, which proxies and potentially filters upstream package repositories. This can help reduce bandwidth costs, improve performance, and improve security via an allowlist.
For customers who have users in multiple regions, it would be helpful to deploy the dependency proxy in multiple regions, to improve performance than having to hop all the way out to the primary.
We probably don't need to replicate the cache, as some deps popular in one region may not be present in another, but it would be good to offer the service and caching opportunity for requests that do come through on a secondary.