Oracle Cloud and Docker Installation not accessible remotely via domain

Checklist
[*] I have read intro post: About the Installation Issues category
[ *] I have read the tutorials, help and searched for similar issues
[ ] I provide relevant information about my server (component names and versions, etc.)
[ ] I provide a copy of my logs and healthcheck
[
] I describe the steps I have taken to trouble shoot the problem
[ *] I describe the steps on how to reproduce the issue

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I have installed Passbolt with Docker in Oracle Cloud Free tier following Networkchuk’s tutorial using ubuntu 22.04 image. I am using domain to access it remotely and domain DNS is steup to resolve the domain queries to my ubuntu server - this is confirmed with nslookup.
Also port 443 is opened in iPtables.
After completion sucessfull installtion I was provided with the link to complete the installtion in the browser, however it times out and I am not been able to figure it out why.

iptables rules:

root@passbolt:/passbolt# iptables -L INPUT
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     udp  --  anywhere             anywhere             udp dpt:465
ACCEPT     udp  --  anywhere             anywhere             udp dpt:587
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:submission
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:submissions
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:smtp
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:mysql
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     icmp --  anywhere             anywhere
ACCEPT     all  --  anywhere             anywhere
ACCEPT     udp  --  anywhere             anywhere             udp spt:ntp
ACCEPT     tcp  --  anywhere             anywhere             state NEW tcp dpt:ssh
REJECT     all  --  anywhere             anywhere             reject-with icmp-host-prohibited