Is the PushProx client itself able to use a web proxy to reach the remote PushProx server?

[saulp]

(Hi! Long time listener, first time caller. Great tool!)

For context: We monitor some of our customers' servers by installing a pushprox and a node exporter on their machine, and on our end we run a pushprox server (exposed to the internet through a reverse proxy) that can reach our internal prometheus server.

This is the use case: One of our customer's servers, in addition to not being exposed to the internet, is only able to get to the internet through a proxy, Squid I believe. Also, it is not a transparent proxy.

Is there a way for the pushprox client to explicitly specify an HTTP proxy for it to reach the outside world?