firefly-iii: Migrate to sealed secrets

firefly-iii/kustomization.yaml

@@ -4,6 +4,7 @@ kind: Kustomization
 namespace: firefly-iii
 
 resources:
+- secrets.yaml
 - redis.yaml
 - firefly-iii.yaml
 - ingress.yaml
@@ -22,20 +23,6 @@ configMapGenerator:
   options:
     disableNameSuffixHash: true
 
-secretGenerator:
-- name: firefly-iii
-  files:
-  - app.key
-  - cron.token
-  options:
-    disableNameSuffixHash: true
-- name: firefly-iii-importer
-  files:
-  - dustin.access-token
-  - tabitha.access-token
-  options:
-    disableNameSuffixHash: true
-
 patches:
 # This patch changes the source secret for the PostgreSQL database
 # password from the default (`db.password` inside `firefly-iii`) to