{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "customManagers": [
    {
      "customType": "regex",
      "description": "Detect ARG VERSION pin for dunglas/frankenphp base image",
      "managerFilePatterns": [
        "/^Dockerfile$/"
      ],
      "matchStrings": [
        "ARG\\s+VERSION=\"(?<currentValue>[^\"]+)\""
      ],
      "depNameTemplate": "dunglas/frankenphp",
      "datasourceTemplate": "docker"
    }
  ]
}