code: func HeadersFromContext(headers ...string) Handler {
  	return Handler{
  		Name: "HeadersFromContext",
  		Fn: func(r *Request) {
  			for _, header := range headers {
  				r.HTTPRequest.Header.Add(header, httpx.Header(r.HTTPRequest.Context(), header))
  			}
  		},
  	}
  }
docs: // HeadersFromContext adds headers with values from the request context.
  // This is useful for forwarding headers to upstream services.