feat: add renovate

.github/workflows/renovate.yaml

@@ -0,0 +1,19 @@
+name: Renovate
+
+on:
+  schedule:
+    - cron: "0 3 * * *"   # täglich um 3 Uhr nachts
+  workflow_dispatch:        # auch manuell triggerbar
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/renovatebot/renovate:latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: renovate
+        env:
+          RENOVATE_CONFIG_FILE: renovate.js
+          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
+          LOG_LEVEL: info

renovate.js

@@ -0,0 +1,7 @@
+module.exports = {
+  endpoint: "https://git.hashdot.co/api/v1",
+  gitAuthor: "Renovate Bot <renovate@hashdot.co>",
+  platform: "gitea",
+  autodiscover: true,
+  optimizeForDisabled: true,
+};