Use a pvc for cache

Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>

helm/values.yaml

@@ -48,7 +48,6 @@ base:
               path: /data/.faircamp_build
             music:
               path: /data/music
-          extraVolumes:
             cache:
               path: /data/.faircamp_cache
         securityContext:
@@ -103,9 +102,6 @@ ingress:
       - hosts:
           - '{{ .Values.shortcuts.hostname }}'
         secretName: '{{ .Values.shortcuts.hostname }}'
-extraVolumes:
-  cache: 
-    emptyDir: {}
 
 services:
   main:
@@ -130,6 +126,12 @@ storage:
     size: 3Gi
     accessModes:
       - ReadWriteOnce
+  cache:
+    enabled: true
+    storageClassName: default
+    size: 3Gi
+    accessModes:
+      - ReadWriteOnce
 
 config:
   # -- Please have a look here: https://github.com/dani-garcia/vaultwarden/blob/main/.env.template