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/base/service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: math-exercises-service
+  annotations:
+    # Security annotations
+    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
+spec:
+  selector:
+    app: math-exercises
+  ports:
+    - name: http
+      protocol: TCP
+      port: 80
+      targetPort: 8000
+  type: ClusterIP
+  # Only accessible within the cluster
+  internalTrafficPolicy: Local