github/workflows: init renovatebot

.github/renovate.json

@@ -0,0 +1,7 @@
+{
+  "extends": ["config:base"]",
+  "baseBranches": ["main"],
+  "branchPrefix": "renovateaction",
+  "extends": ["config:base", ":rebaseStalePrs"],
+  "enabledManagers": ["dockerfile", "go", "github-actions"]
+}

.github/workflows/renovatebot.yml

@@ -0,0 +1,26 @@
+---
+name: Renovate
+on:
+  schedule:
+    - cron: '* * 5,20 * *' #Every 5th and 20th of the month
+  workflow_dispatch: 
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get token
+        id: get_token
+        uses: machine-learning-apps/actions-app-token@master
+        with:
+          APP_PEM: ${{ secrets.RENOVATEBOT_SECRET }}
+          APP_ID: ${{ secrets.RENOVATEBOT_APP_ID }}
+
+      - name: Checkout
+        uses: actions/checkout@v2.0.0
+
+      - name: Self-hosted Renovate
+        uses: renovatebot/github-action@v31.81.2
+        with:
+          configurationFile: .github/renovate.json
+          token: 'x-access-token:${{ steps.get_token.outputs.app_token }}'
+          onboarding: false