Hello, I'm having trouble using the sub_filter option with NginX running on Ubuntu. It's serving an internal filemaker server externally, at $externalURL, but one of the folders uses an internal path to the server. This ends up in an error saying you can't reach internalURL, check for typos. I want to substitute https://internalURL for https://$externalURL. My output from nginx -V iby hasaph - How to...