Add renovate configuration

renovate.json

@@ -0,0 +1,11 @@
+{
+  "extends": ["config:recommended"],
+  "labels": ["renovate"],
+  "configMigration": true,
+  "packageRules": [
+    {
+      "matchPackageNames": "ghcr.io/renovatebot/renovate",
+      "automerge": true
+    }
+  ]
+}