Is it possible to host this image on a subdomain http://server/etesync using a BASE_URL or similar?

[ioogithub]

The default is to server http://server:port. Is it possible to server from a subdomain such as http://server/etesync? This way it can be integrated into a webserver with other services and behind a reverse proxy to the outside world. I am currently using an apache reverse proxy on bare metal server to host several webservices and all of these different webapps have a BASE_URL variable or similar. Is this possible to do something similar with this docker image of etesync?

Would it be a matter of editing the default.conf file to serve the base url from http://server to http:server/etesync or is there somewhere else I would have to configure?