Add Proxy Settings

[Sinterdial]

Describe the feature you'd like

In certain regions of the world, internet censorship is very strict, so proxies must be used to access some very popular websites (e.g. googlemaps, openstreetmap).

However, when I tried to use the environment variables HTTP_PROXY and HTTPS_PROXY to route container traffic through a proxy, it had no effect. I hope there can be configuration options added in the .env file to enable this functionality.

Describe the benefits this would bring to existing users

Users around the world

Can the goal of this request already be achieved via other means?

Yes, this could perhaps be achieved by setting the proxy in the host's network settings, but I only want to enable the proxy for specific containers

Have you searched for an existing open/closed issue?

I have searched for existing issues and none cover my fundamental request