Fix Cuby K8s certificate issue with NODE_EXTRA_CA_CERTS

Add NODE_EXTRA_CA_CERTS env var pointing to the Kubernetes service
account CA certificate to trust the self-signed K3s API server cert.

Author: Robin Lenz

hetzner-setup/ProcessCube.Cloud/ansible/roles/install_cuby/templates/cuby-operator.yaml.j2

@@ -136,6 +136,8 @@ spec:
           env:
             - name: NODE_ENV
               value: "production"
+            - name: NODE_EXTRA_CA_CERTS
+              value: "/var/run/secrets/kubernetes.io/serviceaccount/ca.crt"
             - name: CUBY_MODE
               value: "operator"
             - name: CUBY_CONFIG_DIR