{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": ["config:recommended"],
  "enabledManagers": ["dockerfile"],
  "packageRules": [
    {
      "description": "Alpine base image: only propose stable MAJOR.MINOR release tags (no edge, RC, patch or datestamp tags).",
      "matchDatasources": ["docker"],
      "matchPackageNames": ["alpine"],
      "allowedVersions": "/^\\d+\\.\\d+$/"
    }
  ]
}