feat(ingress): update ingress configuration for alb

Changes the ingress class annotation to the new format and 
adds the ingressClassName field to specify the ALB ingress 
class. This improves compatibility with Kubernetes and aligns 
the configuration with the latest best practices.

k8s/ingress-local.yaml

@@ -3,9 +3,9 @@ kind: Ingress
 metadata:
   name: dancefinder-app-ingress
   annotations:
-    kubernetes.io/ingress.class: "nginx"
     ingress.kubernetes.io/enable-cors: "true"
 spec:
+  ingressClassName: "nginx"
   rules:
   - host: "local-dancefinder.unbound.se"
     http:

k8s/ingress-prod.yaml

@@ -3,13 +3,14 @@ kind: Ingress
 metadata:
   name: dancefinder-app-ingress
   annotations:
-    kubernetes.io/ingress.class: "alb"
+    alb.ingress.kubernetes.io/group.name: "default"
     alb.ingress.kubernetes.io/group.order: "101"
     alb.ingress.kubernetes.io/scheme: internet-facing
     alb.ingress.kubernetes.io/target-type: instance
     alb.ingress.kubernetes.io/listen-ports: '[{"HTTP": 80},{"HTTPS": 443}]'
     alb.ingress.kubernetes.io/ssl-redirect: "443"
 spec:
+  ingressClassName: "alb"
   rules:
     - host: "dancefinder.unbound.se"
       http: