When enabled, Node.js parses the `HTTP_PROXY`, `HTTPS_PROXY` and
`NO_PROXY` environment variables during startup, and tunnels requests
over the specified proxy.
This currently only affects requests sent over `fetch()`. Support for
other built-in `http` and `https` methods is under way.
PR-URL: https://github.com/nodejs/node/pull/57165
Refs: https://github.com/nodejs/undici/issues/1650
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>