{
    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
    "customManagers": [
      {
        "customType": "regex",
        "description": "Update _VERSION variables in Dockerfiles",
        "fileMatch": [
          "(^|/|\\.)Dockerfile$",
          "(^|/)Dockerfile\\.[^/]*$"
        ],
        "matchStrings": [
          "# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))? packageName=(?<packageName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=(?<currentValue>.+?)\\s"
        ]
      }
    ]
}