Set up Renovate configuration with default and Docker-specific presets. Updated bot settings and added README.

config.js

@@ -1,8 +1,14 @@
 module.exports = {
-    "endpoint": "https://gitea.spenke-nordic.com/api/v1", // replace it with your actual endpoint
-    "gitAuthor": "Renovate Bot <renovate-bot@spenke-nordic.com>",
-    "platform": "gitea",
-    "onboardingConfigFileName": "renovate.json",
-    "autodiscover": true,
-    "optimizeForDisabled": true,
+  endpoint: "https://gitea.spenke-nordic.com/api/v1", // replace it with your actual endpoint
+  gitAuthor: "Renovate Bot <renovate-bot@spenke-nordic.com>",
+  platform: "gitea",
+  onboardingConfigFileName: "renovate.json",
+  autodiscover: true,
+  optimizeForDisabled: true,
+  dependencyDashboard: true,
+  dependencyDashboardTitle: "Dependency Dashboard",
+  prConcurrentLimit: 10,
+  prHourlyLimit: 0,
+  stabilityDays: 3,
+  labels: ["dependencies", "renovate"],
 };