denoland-deno/docs/linking_to_external_code/proxies.md

## Proxies

Deno supports proxies for module downloads and the Web standard `fetch` API.

Proxy configuration is read from environmental variables: `HTTP_PROXY`,
`HTTPS_PROXY` and `NO_PROXY`.

In case of Windows, if environment variables are not found Deno falls back to
reading proxies from registry.