Add automatic upgrade PR for docker-machine driver

Dockerfile

@@ -1,6 +1,7 @@
 FROM docker.io/gitlab/gitlab-runner:v13.9.0
 
 LABEL maintainer="Sheogorath <sheogorath@shivering-isles.com>"
+# renovate: datasource=github-tags depName=JonasProgrammer/docker-machine-driver-hetzner
 ARG HETZNER_VERSION=3.2.0
 ARG HETZNER_HASH=d187fef169aff3100984b7d9ad842acf43ba09ccb398fd21e8d22de91576857f
 

renovate.json

@@ -4,6 +4,13 @@
     "config:base",
     "docker:enableMajor"
   ],
+  "regexManagers": [
+        {
+            "fileMatch": ["^Dockerfile$"],
+            "matchStrings": ["# renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\n\\s*ARG ([A-Z_]+_VERSION)=\"?(?<currentValue>.*?)\"?\\n"],
+            "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}"
+        }
+  ],
   "prConcurrentLimit": 5,
   "automerge": true,
   "gitLabAutomerge": true