TLS Certificate
When you have a cluster with a public IP and DNS links your domain name to that cluster, it’s about time to think about the security and prepare a TLS-certificate that you that the CluedIn application will use when users access it via HTTPS.
You can buy a certificate or get a free one via a service like Let’s Encrypt. It has to be either a wildcard certificate for all the subdomains of your primary domain or a multi-domain certificate that will cover the URLs listed in the DNS.