Add NODE_TLS_REJECT_UNAUTHORIZED=0 for K8s API

This disables TLS certificate verification globally in Node.js,
allowing the backend to communicate with K8s API using self-signed certs.

NOTE: This is acceptable for development but should use proper CA certs
in production.

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

k8s/backend/deployment.yaml

@@ -60,6 +60,8 @@ spec:
         # Kubernetes
         - name: K8S_IN_CLUSTER
           value: "true"
+        - name: NODE_TLS_REJECT_UNAUTHORIZED
+          value: "0"
 
         # App config
         - name: NODE_ENV