http system proxy conflict

[popcmp]

This plugin sets up its own proxy for sniffing purposes. However, I already have one for internet access.
As a result, the interceptor overrides my proxy with its own.
Is there a way to maintain internet access through the HTTP proxy while also using the interceptor at the same time?

[dimakozin]

Please try my fixes from my fork.
You just need to set one of the following environment variables:

• UPSTREAM_PROXY
• HTTPS_PROXY
• HTTP_PROXY

The plugin proxy will forward the traffic to your proxy.
I tested it with Proxyman, and it works correctly.