NGINX: Redirect from current location into named location

nginx_redirect_2named_location

  # Use only codes  greater than 418, do not use common status codes 404, 402, 403, etc

  location /js {
    error_page 418 = @backend; return 418;
  }

  location /data {
    error_page 418 = @backend; return 418;
  }

  location @backend {
    rewrite ^/(.+)$ /backend-url-prefix/$1 break;

    proxy_pass   http://127.0.0.1:82;
    proxy_redirect     off;

    proxy_set_header   Host             $host;
    proxy_set_header   X-Real-IP        $remote_addr;
    proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;    
  }