From taking a quick look at the tutorial it doesn’t include the SSL setup specifically.
If you want n8n to terminate SSL/TLS connections you’d need to point the N8N_SSL_CERT and N8N_SSL_KEYenvironment variables to the respective locations on your volume.
That said, SSL/TLS termination often takes place outside of n8n (or most other applications for that matter), for example through a reverse proxy or your load balancer service. You might want to refer to their respective documentation for more information on this.
If you’re new to n8n you could also consider starting with a simpler setup than a k8s cluster (the Digital Ocean and Hetzner setups describe a simple Docker/Caddy setup which should also work on other hosting providers).