FEAT(applications): enable HA with replica 2 and soft anti-affinity

- Add replicaCount: 2 to docusaurus, headlamp, homer, mas, umami
- Add soft pod anti-affinity for node distribution
- Enable high availability across multiple nodes

docusaurus/helm-values.yaml

@@ -3,6 +3,7 @@
 
 controllers:
   main:
+    replicaCount: 2
     annotations:
       docusaurus/source-hash: "2024-12-30-v1"
     initContainers:
@@ -55,6 +56,16 @@ controllers:
                 port: 80
               initialDelaySeconds: 5
               periodSeconds: 5
+    # Affinity - Soft Anti-Affinity to spread pods across nodes
+    affinity:
+      podAntiAffinity:
+        preferredDuringSchedulingIgnoredDuringExecution:
+          - weight: 100
+            podAffinityTerm:
+              labelSelector:
+                matchLabels:
+                  app.kubernetes.io/name: docusaurus
+              topologyKey: kubernetes.io/hostname
 
 service:
   main: