Needs to serve the correct Cache-control headers
Because the vpnweb service is behind a nginx caching proxy, it needs to tell the proxy about what it should, and should not be caching.
That is done by emitting the proper Cache-control headers: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control
Perhaps only "Cache-Control: no-cache" is all that would be necessary.