**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/guide/index.md

@@ -0,0 +1,19 @@
+# Getting Started
+
+For quick setup instructions, see the [README](https://gitea.jeanlucmakiola.de/makiolaj/DiunDashboard#readme).
+
+For development and contributing guidelines, see [CONTRIBUTING.md](https://gitea.jeanlucmakiola.de/makiolaj/DiunDashboard/src/branch/main/CONTRIBUTING.md).
+
+## Overview
+
+DIUN Webhook Dashboard is a Go web app that receives [DIUN](https://crazymax.dev/diun/) webhook events and shows Docker image updates in a modern React dashboard. Events are persisted to SQLite so they survive restarts.
+
+## Features
+
+- Receives DIUN webhooks at `POST /webhook`
+- Serves a React SPA dashboard at `/`
+- REST API for updates, tags, and acknowledgements
+- Persistent storage via SQLite
+- Tag/group system to organize images
+- Dismiss (acknowledge) updates you've reviewed
+- Optional webhook authentication via `WEBHOOK_SECRET`