Add renovate config

renovate.json5

@@ -0,0 +1,63 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "configMigration": true,
+  "extends": [
+    'config:recommended',
+
+    // Make sure we get a single PR combining all updates
+    'group:all',
+  ],
+  "automerge": false,
+  "separateMinorPatch": true,
+  "gitAuthor": "renovate[bot] <bot@renovateapp.com>",
+  "enabledManagers": [
+    "dockerfile",
+    "custom.regex"
+  ],
+  "packageRules": [
+    {
+      "matchDatasources": [
+        "repology"
+      ],
+      "matchPackagePatterns": [
+        "^debian_"
+      ],
+      "groupName": "debian packages",
+      "groupSlug": "debian"
+    },
+    {
+      "matchDatasources": [
+        "repology"
+      ],
+      "matchPackagePatterns": [
+        "^ubuntu_"
+      ],
+      "groupName": "ubuntu packages",
+      "groupSlug": "ubuntu"
+    }
+  ],
+  "customManagers": [
+    {
+      "description": "Update packages set in Dockerfiles",
+      "customType": "regex",
+      "fileMatch": [
+          '(^|/|\\.)([Dd]ocker|[Cc]ontainer)file$',
+          '(^|/)([Dd]ocker|[Cc]ontainer)file[^/]*$',
+      ],
+      "matchStrings": [
+        "#\\srenovate:\\sdatasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?( extractVersion=(?<extractVersion>.*?))?\\s(ENV|ARG) .*?_VERSION=\"(?<currentValue>.*)\"\\s"
+      ],
+      "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}loose{{/if}}",
+      "datasourceTemplate": "{{#if datasource}}{{{datasource}}}{{else}}repology{{/if}}"
+    }
+  ],
+
+  // Disable dependency dashboard
+  "dependencyDashboard": false,
+
+  // Use our labelling system
+  "labels": ['dependencies'],
+
+  // We generally always want the major version
+  "separateMajorMinor": false,
+}