Hello, is it possible to have multiple growthbook proxy instances? We're in a situation where we self-host 1 growthbook that is shared with both staging and production, but we have separate proxy instance for each staging and production because staging and prod services live in separate VPC. But I notice

PROXY_HOST_INTERNAL/PROXY_HOST_PUBLIC

only support one proxy address.

This section in the proxy docs will help you: https://github.com/growthbook/growthbook-proxy?tab=readme-ov-file#horizontally-scaling

It's slightly different though, in our case, we basically have 2 "clusters" of growthbook proxy that are separate from one another, in separate isolated VPC that can't talk to each other, 1 for staging, 1 for prod.

PUBLISH_PAYLOAD_TO_CHANNEL

makes sense for 1 cluster of horizontally scaled proxy.