Trust certificate on Anthias

Hi there,

I would like to show content from a web page I’m hosting locally through HTTPS with its own certificate.
I’ve re-installed Anthias using the Raspberry Pi OS to get SSH access and have added the root cert to the store (1 added):

pi@raspberrypi:/usr/local/share/ca-certificates $ sudo update-ca-certificates
Updating certificates in /etc/ssl/certs…
1 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d…

It was verified that /etc/ssl/certs/ca-certificates.crt shows the newly added cert (PEM base64 format).

However the page still fails on the Anthias browser, also after a reboot, stating ERR_CERT_AUTHORITY_INVALID.

I guess this has to do with the fact that Docker is used and that the cert store might be elsewhere.
Any idea where this would be and how I can add my root certificate, in order to display the web page?