update renovate config

renovate.json

 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:base"
+    "config:recommended"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": [
+        "^.*values.*\\.ya?ml$"
+      ],
+      "matchStrings": [
+        "repository:\\s*netbox-community/netbox\\s*tag:\\s*(?<currentValue>v?[0-9.]+)"
+      ],
+      "datasourceTemplate": "docker",
+      "packageNameTemplate": "netbox-community/netbox",
+      "versioningTemplate": "docker",
+      "extractVersionTemplate": "{{currentValue}}",
+      "registryUrlTemplate": "ghcr.io"
+    }
   ],
   "ignorePresets": [
     ":prHourlyLimit200"

values.yaml

@@ -2,6 +2,8 @@ replicaCount: 2
 
 image:
   pullPolicy: IfNotPresent
+  registry: ghcr.io
+  repository: netbox-community/netbox
   tag: v4.1.3
 
 superuser: