That was already on my agenda for today! Thanks, Scott
Would an addition be useful to the documentation site for discosrv detailing the two Nginx (and equivalent Apache) settings needed for running behind a reverse proxy? Even with @AudriusButkevicius’s help, it took me a looong time to sort this out 
Something like:
Reverse Proxy considerations
When running discosrv behind a reverse proxy, ensure the following are set in your Nginx configuration:
proxy_set_header X-SSL-Cert $ssl_client_cert;ssl_verify_client optional_no_ca;
Or for Apache:
- ???
Scott