Updated Setup Reverse Proxy (markdown)

Setup-Reverse-Proxy.md

@@ -43,6 +43,7 @@ http {
 If you want to use nginx as proxy for subdomain just replace the `/calibre` lines with `/`, do not change anything else and it will work.
 The `X-Scheme` directive is used to preserve the protocol (http/https), it could be hard coded to `http` or `https` to force this type of protocol.\
 *Note: If using SSL in your reverse proxy on a non-standard port (e.g.12345), the following proxy_redirect line may be required:*
+*Note: If you're encountering sync problems, consider adding the proxy settings described in the next section to the nginx config described above.*
 ```
 proxy_redirect http://$host/ https://$host:12345/;
 ```