Add examples for `proxy` option
@@ -438,7 +438,7 @@ define backends in the `definitions` block and use the mandatory *label* as refe
| `max_connections` | Describes the maximum number of concurrent connections in any state (*active* or *idle*) to the `origin`. | `0` (no limit) |
| `origin` | URL to connect to for backend requests </br> &#9888; must start with the scheme `http://...` ||
| `path` | changeable part of upstream URL ||
-| `proxy` | Configured proxy for current backend ||
+| `proxy` | A Proxy URL for the related origin request. Example: `http://SERVER-IP_OR_NAME:PORT` | `none` |
| `request_body_limit` | Limit to configure the maximum buffer size while accessing `req.post` or `req.json_body` content. Valid units are: `KiB, MiB, GiB`. | `64MiB` |
| [**`add_request_headers`**](#request-header) | header map to define additional header values for the `origin` request ||
| [**`add_response_headers`**](#response-header) | same as `add_request_headers` for the client response ||
