Readiness probe endpoint and /audit, /validate share the same default port

[viccuad]

Readiness probe port (--readiness-probe-port) and the normal port (--port) both default to 3000.

Given that we have --port 3000 everywhere in docs, audit-scanner, etc, change --readiness-probe-port.

Acceptance criteria

• Change the default port (--readiness-probe-port) in policy-server to 8081 (same as /healthz, /readyz of controller)
• Update policy-server cli-docs.md
• Make sure ports are correctly exposed in policy-server Dockerfile
• Update docs/reference/policy-server-cli.md
• Check policy-server deployment reconciler on the controller and add probes if needed

[flavio]

While we're at that... can we configure the Policy Server's Service objects to expose these ports on the "standard" ones?

Meaning:

• 8080 -> 80
• 8443 -> 443

[viccuad]

That's indeed better. With that change the card needs to be rewritten, there's quite the notions of port 3000 on docs, development deployment tools, etc (see search).