Is it the location in the requested filepath, or the actual filesystem location?
The location is with regards to the requested URL-path (not strictly a "filepath"). The location of the file on the underlying server's filesystem is irrelevant and unknown to the user-agent making the request.
All requests to these files are client-side HTTP ...
The issue was my own misunderstanding of how Nginx works with Apache. The .htaccess rules appear not to work because they are never invoked as the request is handled by Nginx thus never reaches Apache.
For anyone else using Cloudways, it is not possible at this time for custom Nginx rules to be added through the user control panel, the SSH console or by the ...
The Age HTTP response header indicates the response is coming from an intermediary proxy server (cache), not your origin server. From the MDN Web Docs:
The Age header contains the time in seconds the object has been in a
The Age header is usually close to zero. If it is Age: 0, it was
probably just fetched from the origin server;