Add Renovate configuration

Author: Donnerbart

renovate.json5

@@ -0,0 +1,40 @@
+{
+    $schema: "https://docs.renovatebot.com/renovate-schema.json",
+    extends: [
+        "config:recommended",
+        "schedule:weekends",
+        "schedule:automergeNonOfficeHours"
+    ],
+    enabledManagers: [
+        "github-actions",
+    ],
+    major: {
+        dependencyDashboardApproval: true,
+    },
+    pinDigests: true,
+    labels: [
+        "renovate",
+    ],
+    dependencyDashboardLabels: [
+        "renovate",
+    ],
+    packageRules: [
+        // GitHub Actions
+        {
+            matchManagers: [
+                "github-actions",
+            ],
+            matchUpdateTypes: [
+                "major",
+                "minor",
+                "patch",
+                "digest"
+            ],
+            groupName: "GitHub Actions dependencies",
+            groupSlug: "github-actions",
+            dependencyDashboardApproval: false,
+            automerge: true,
+            platformAutomerge: true,
+        },
+    ],
+}