feat: configure renovate regex manager (#3)

* Add Renovate configuration with custom regex manager

* Fix Renovate configuration

* Manage devpod version with Renovate

* Add simple workflow to validate Renovate configuration

* Use newer Renovate custom manager syntax

.github/renovate.json5

@@ -0,0 +1,13 @@
+{
+  "extends": ["config:recommended"],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": [".*\\.spec"],
+      "matchStrings": [
+        "#\\s?renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?( extractVersion=(?<extractVersion>.*?))?\\s*Version:\\s*(?<currentValue>.*)\\s"
+      ],
+      "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}"
+    }
+  ]
+}

.github/workflows/renovate.yml

@@ -0,0 +1,25 @@
+name: Validate Renovate
+
+on:
+  pull_request:
+    paths:
+      - "**/renovate.json"
+      - "**/renovate.json5"
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: latest
+
+      - name: Install dependencies
+        run: npm install -g renovate
+
+      - name: Validate Renovate config
+        run: renovate-config-validator --strict

staging/devpod/devpod.spec

@@ -1,4 +1,5 @@
 Name:           devpod
+# renovate: datasource=github-releases depName=loft-sh/devpod
 Version:        v0.4.2
 Release:        1%{?dist}
 Summary:        Codespaces but open-source, client-only and unopinionated.