configure renovate with a recurring action

.forgejo/workflows/renovate.yaml

@@ -0,0 +1,27 @@
+name: Renovate Dependency Bot
+
+on:
+  schedule:
+    - cron: "0 3 * * *"
+  workflow_dispatch:
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "18"
+
+      - name: Renovate
+        uses: github.com/renovatebot/github-action@v42.0.4
+        with:
+          token: ${{ secrets.RENOVATE_TOKEN }}
+        env:
+          LOG_LEVEL: info
+          RENOVATE_CONFIG_FILE: renovate.json
+          RENOVATE_ENDPOINT: ${{ vars.RENOVATE_ENDPOINT }}