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

k8s-deployment.yaml

@@ -0,0 +1,53 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: math-exercises-app
+  labels:
+    app: math-exercises
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: math-exercises
+  template:
+    metadata:
+      labels:
+        app: math-exercises
+    spec:
+      containers:
+      - name: math-exercises
+        image: math-exercises:latest
+        ports:
+        - containerPort: 8000
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "250m"
+          limits:
+            memory: "128Mi"
+            cpu: "500m"
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 8000
+          initialDelaySeconds: 30
+          periodSeconds: 10
+        readinessProbe:
+          httpGet:
+            path: /
+            port: 8000
+          initialDelaySeconds: 5
+          periodSeconds: 10
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: math-exercises-service
+spec:
+  selector:
+    app: math-exercises
+  ports:
+    - protocol: TCP
+      port: 80
+      targetPort: 8000
+  type: ClusterIP