Add config for docker image

.github/renovate.json

@@ -6,6 +6,17 @@
   "commitMessagePrefix": "⬆️",
   "commitMessageTopic": "{{depName}}",
   "forkProcessing": "enabled",
+  "regexManagers": [
+    {
+      "fileMatch": ["/Dockerfile$", "/build.yaml$"],
+      "matchStringsStrategy": "any",
+      "matchStrings": [
+        "ARG BUILD_FROM=(?<depName>.*?):(?<currentValue>.*?)\\s+",
+        "(aarch64|amd64|armhf|armv7|i386):\\s[\"']?(?<depName>.*?):(?<currentValue>.*?)[\"']?\\s"
+      ],
+      "datasourceTemplate": "docker"
+    }
+  ],
   "packageRules": [
     {
       "matchManagers": ["github-actions"],
@@ -16,6 +27,16 @@
       "matchManagers": ["github-actions"],
       "matchUpdateTypes": ["minor", "patch"],
       "automerge": true
-    }
+    },
+    {
+      "groupName": "Add-on base image",
+      "matchDatasources": ["docker"]
+    },
+    {
+      "groupName": "Add-on base image",
+      "matchDatasources": ["docker"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    },
   ]
 }