Enable IPv6 on docker image for Bitwarden

How do I enable IPv6 support when running Bitwarden from its Docker image? I changed /etc/docker/daemon.json as follows bit Bitwarden is still not reachable via IPv6:

  "log-level": "warn",
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "5"
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64"

I am not sure if “fixed-cidr-v6”: “2001:db8:1::/64” is correct, though.

Do I need to change anything else?

I also am having a problem with this. I’ve added the similar settings to /etc/docker/daemon.json, and I’ve also added IPv6 ports to the nginx service:

      - '80:8080' 
      - '443:8443' 
      - ":::80:8080" # <== added
      - ":::443:8443" # <== added

But this doesn’t work.

Any update on this? I would like IPv6 as well.