add renovate workflow

.gitea/workflows/renovate.yaml

@@ -0,0 +1,29 @@
+name: renovate
+
+on:
+  schedule:
+    - cron: "@daily"
+
+  push:
+    branches:
+      - main
+
+  workflow_dispatch:
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    container: ghcr.io/renovatebot/renovate:40
+    steps:
+      - uses: actions/checkout@v4
+      - run: renovate
+        env:
+          RENOVATE_PLATFORM: gitea
+          RENOVATE_AUTODISCOVER: true
+          RENOVATE_ONBOARDING: true
+          RENOVATE_ENDPOINT: http://gitea-http.gitea:3000
+          RENOVATE_GIT_AUTHOR: Renovate Bot <renovate-bot@alexlebens.net>
+          LOG_LEVEL: debug
+          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
+          RENOVATE_GIT_PRIVATE_KEY: ${{ secrets.RENOVATE_GIT_PRIVATE_KEY }}
+          RENOVATE_GITHUB_COM_TOKEN: ${{ secrets.RENOVATE_GITHUB_COM_TOKEN }}