fix: update Nginx configuration for /auth path to support regex and rewrite target

Author: batazor

ops/Helm/auth-ui/values.yaml

@@ -15,11 +15,12 @@ ingress:
     cert-manager.io/cluster-issuer: cert-manager-production
     nginx.ingress.kubernetes.io/enable-owasp-core-rules: "true"
     nginx.ingress.kubernetes.io/enable-opentelemetry: "true"
+    nginx.ingress.kubernetes.io/rewrite-target: /next/$2
+    nginx.ingress.kubernetes.io/use-regex: "true"
 
   hostname: shortlink.best
   paths:
-    - path: /auth
-      pathType: Prefix
+    - path: /auth(/|$)(.*)
       service:
         name: shortlink-auth-ui
         port: 8080