renovate.json

{
    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
    "extends": [
        "local>DanySK/renovate-config"
    ],
    "regexManagers": [
        {
          "fileMatch": ["^.*\\.md$"],
          "matchStrings": [
              "(<!--\\s*from-branch:\\s*(?<branch>[^\\s]+)\\s*-->)?\\s*!\\[(?<imageName>.*)\\]\\(https:\\/\\/raw\\.githubusercontent\\.com\\/(?<slug>[^\\/]+\\/[^\\/]+)\\/(?<currentDigest>[^\\/]+)\\/(?<path>.+)\\)"
          ],
          "depNameTemplate": "image {{#if imageName}}{{{imageName}}}{{else}}{{{slug}}}/{{{path}}}{{/if}}",
          "currentValueTemplate": "{{#if branch}}{{{branch}}}{{else}}images{{/if}}",
          "packageNameTemplate": "https://github.com/{{{slug}}}.git",
          "datasourceTemplate": "git-refs",
          "versioningTemplate": "git"
        }
    ]
}