improve proxy doc
@@ -85,7 +85,13 @@ Setting up a proxy works out of the box, the [net/http golang library](https://g
* `HTTPS_PROXY`
* `NO_PROXY`
-Since {{v1X.cli.name}} uses `sudo`, you just this line in `visudo` after setting up the previous environment variables:
+For example:
+
+```
+export HTTP_PROXY=http://<proxy_url>
+```
+
+If you uses `sudo` {{v1X.cli.name}}, just add this line in `visudo` after setting up the previous environment variables:
```
Defaults env_keep += "HTTP_PROXY HTTPS_PROXY NO_PROXY"
