Install on a debian server with haproxy managing ssl connections

I istalled jitsy following https://jitsi.org/downloads/ubuntu-debian-installations-instructions/, but, on my server, port 443 is managed by haproxy and not by apache.

443 haproxy -> 80 varnish -> 8080 apache

So the tipicall install performed by the deb package doesn’t work.

How should I modify the installation in order to get jitsi meet work?