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/deployment-patch.yaml

@@ -0,0 +1,37 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: math-exercises-app
+  annotations:
+    # Production environment annotation
+    environment: production
+    # Security annotations
+    seccomp.security.alpha.kubernetes.io/pod: docker/default
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: math-exercises
+        env:
+        - name: ENVIRONMENT
+          value: production
+        - name: DEBUG
+          value: "false"
+        # Enhanced security for production
+        securityContext:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
+          runAsNonRoot: true
+          runAsUser: 1000
+          capabilities:
+            drop:
+              - ALL
+        # Production resource settings
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "250m"
+          limits:
+            memory: "128Mi"
+            cpu: "500m"