Initial draft of plugin.

renovate.json

@@ -0,0 +1,24 @@
+{
+	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
+	"extends": ["local>infrastructure/renovate-config", ":reviewer(stephan.schnabel)"]	,
+	"packageRules": [
+		{
+			"description": "Renovate should only update its major version because of pull policy Always.",
+			"matchPackageNames": ["docker.io/renovate/renovate"],
+			"matchUpdateTypes": ["minor", "patch"],
+			"automerge": true
+		}
+	],
+	"customManagers": [
+		{
+			"customType": "regex",
+			"managerFilePatterns": [".woodpecker/build.yaml"],
+			"matchStrings": [
+				"kokuwaio/renovate-config-validator:(?<currentValue>[0-9]+\\.[0-9]+\\.[0-9]+)",
+				"version: (?<currentValue>[0-9]+\\.[0-9]+\\.[0-9]+)"
+			],
+			"datasourceTemplate": "docker",
+			"packageNameTemplate": "docker.io/renovate/renovate"
+		}
+	]
+}