chore: add renovate configuration

Author: fredleger

.github/dependabot.yml

@@ -27,15 +27,5 @@ updates:
         patterns:
           - "*"
 
-  - package-ecosystem: "terraform"
-    open-pull-requests-limit: 20
-    directories:
-      - "ovh/*/providers.tf"
-    schedule:
-      interval: "weekly"
-      day: "friday"
-      time: "04:30"
-    groups:
-      terraform-dependencies:
-        patterns:
-          - "*"
+  # Terraform updates are handled by Renovate (see renovate.json)
+  # Dependabot doesn't support recursive directory scanning for monorepos

renovate.json

@@ -0,0 +1,53 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "schedule": [
+    "before 6am on friday"
+  ],
+  "timezone": "Europe/Paris",
+  "prConcurrentLimit": 20,
+  "prCreation": "immediate",
+  "rebaseWhen": "behind-base-branch",
+  "semanticCommits": "enabled",
+  "packageRules": [
+    {
+      "description": "Group all Terraform provider updates",
+      "matchManagers": ["terraform"],
+      "matchDatasources": ["terraform-provider"],
+      "groupName": "terraform-providers",
+      "automerge": false
+    },
+    {
+      "description": "Group all Terraform module updates",
+      "matchManagers": ["terraform"],
+      "matchDatasources": ["terraform-module"],
+      "groupName": "terraform-modules",
+      "automerge": false
+    },
+    {
+      "description": "Pin GitHub Actions to commit SHA",
+      "matchManagers": ["github-actions"],
+      "pinDigests": true
+    },
+    {
+      "description": "Group all GitHub Actions updates",
+      "matchManagers": ["github-actions"],
+      "groupName": "github-actions",
+      "automerge": false
+    },
+    {
+      "description": "Group Docker base image updates",
+      "matchManagers": ["dockerfile"],
+      "groupName": "docker-base-images",
+      "automerge": false
+    },
+    {
+      "description": "Group devcontainer updates",
+      "matchManagers": ["devcontainer"],
+      "groupName": "devcontainer",
+      "automerge": false
+    }
+  ]
+}