setup/doc/apache-ssl.md

• check web service port configuration of ssl_module for port 443

sudo a2enmod ssl
sudo systemctl restart apache2
systemctl status apache2
sudo apachectl configtest
less /etc/apache2/ports.conf

• OPTION: check firewall (nftables) configuration for port 443

less /etc/nftables.conf

• OPTION: check firewall (ufw) configuration for port 443

sudo ufw status

• test API in browser

https://<hostname -I>