Add http proxy documentation

[panaC]

edrlab/thorium-reader@994188c

[panaC]

https://github.com/edrlab/thorium-reader?tab=readme-ov-file#proxy-server-support

[panaC]

documentation from https://www.npmjs.com/package/proxy-from-env#environment-variables

[gautierchomel]

Not sure what is expected here.

[gautierchomel]

I understand that the original issue Thorium behind a proxy : not working #1904 is now fixed, so I see nothing to document for the user.

[danielweck]

Hello @gautierchomel the Thorium documentation could mention the environment variables NO_PROXY, HTTPS_PROXY, HTTP_PROXY, ALL_PROXY, etc.

https://github.com/Rob--W/proxy-from-env?tab=readme-ov-file#environment-variables

This is how a user-defined proxy gets picked-up by Thorium, or more precisely by the underlying library:

https://github.com/TooTallNate/proxy-agents/tree/main/packages/proxy-agent

[gautierchomel]

This is a very technical information that seems to be already available in the thorium reader repo readme Proxy server support section.