add renovate

.woodpecker/.deploy.yaml

@@ -1,4 +1,6 @@
 skip_clone: true
+labels:
+  backend: docker
 steps:
 - name: bump tag in deployment-repo
   image: git.ar21.de/aaron/debian-ci

renovate.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "packageRules": [
+    {
+      "matchPackagePatterns": ["*"],
+      "automerge": true,
+      "automergeType": "branch"
+    }
+  ]
+}