renovate.json

{
    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
    "extends": [
        "config:recommended"
    ],
    "rebaseWhen": "conflicted",
    "packageRules": [
        {
            "groupName": "minor and patch updates",
            "matchUpdateTypes": [
                "minor",
                "patch",
                "pin",
                "digest"
            ],
            "matchPackageNames": [
                "*"
            ]
        }
    ],
    "customManagers": [
        {
            "customType": "regex",
            "description": "Update _VERSION variables in Dockerfiles",
            "fileMatch": [
                "(^|/|\\.)Dockerfile$",
                "(^|/)Dockerfile\\.[^/]*$"
            ],
            "matchStrings": [
                "# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))? packageName=(?<packageName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=(?<currentValue>.+?)\\s"
            ]
        }
    ]
}