feat: Configure production deployment with math-tables namespace and ingress

Changes made:

- Remove problematic configuration-snippet from base ingress

- Add namespace creation for math-tables

- Configure ingress with nginx class and letsencrypt-prod issuer

- Set production hostname to math-tables.cl1.parano.ch

- Reduce production replicas to 1

- Update copyright year in index.html

deploy/overlays/production/kustomization.yaml

@@ -0,0 +1,25 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: math-tables
+
+resources:
+- ../../base
+- namespace.yaml
+
+# Production-specific patches
+patchesStrategicMerge:
+- deployment-patch.yaml
+- security-patch.yaml
+- ingress-patch.yaml
+
+# Production-specific configurations
+images:
+- name: math-exercises
+  newName: harbor.cl1.parano.ch/library/math-exercice
+  newTag: 1.0.0
+
+# Production-specific labels
+commonLabels:
+  environment: production
+  security-level: high