**chore(docs):** add .gitignore for docs and introduce bun.lock file

- Add `.gitignore` to exclude `node_modules/`, `.vitepress/cache/`, and `.vitepress/dist/` directories
- Include `bun.lock` for dependency management with Bun

docs/index.md

@@ -0,0 +1,22 @@
+---
+layout: home
+
+hero:
+  name: DIUN Webhook Dashboard
+  tagline: A modern dashboard for Docker image update notifications
+  actions:
+    - theme: brand
+      text: Get Started
+      link: /guide/
+    - theme: alt
+      text: View on Gitea
+      link: https://gitea.jeanlucmakiola.de/makiolaj/DiunDashboard
+
+features:
+  - title: Real-time Webhooks
+    details: Receives DIUN webhook events and displays image updates instantly in a modern dashboard.
+  - title: Persistent Storage
+    details: Events are stored in SQLite so they survive restarts. No external database required.
+  - title: Organize with Tags
+    details: Group and tag images to keep your update notifications organized. Dismiss updates you've reviewed.
+---