Vault webserver HTTPS

Good day, I am new on vault and Kubernetes, and I want to know how I can activate the HTTPS webserver of vault.
I have a vault in a Kubernetes system and in the configuration, i found this:

  • name: https-internal
    nodePort: 30223
    port: 8201
    protocol: TCP
    targetPort: 8201
    Is there any way to use that? or to put a certificate and key?.

I need that the webserver of vault to be HTTPS and not HTTP. I was looking on the internet but I could not find anything that helps me, could you give me some advice, please?

Kind Regards,

The example on the setup page is with tls enabled.