docs: add comprehensive onboarding documentation for new users

docs/README.md

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+# 📚 Documentation
+
+Welcome to the doocs/md documentation! This directory contains comprehensive guides to help you get the most out of our WeChat Markdown editor.
+
+---
+
+## 📖 Documentation Index
+
+### 🚀 Getting Started
+
+| Document | Description | For |
+|----------|-------------|-----|
+| [getting-started.md](./getting-started.md) | Complete onboarding guide with all deployment options | New users |
+| [markdown-guide.md](./markdown-guide.md) | Full Markdown syntax reference with examples | All users |
+| [example-content.md](./example-content.md) | Ready-to-use article templates | Content creators |
+
+### ⚙️ Configuration Guides
+
+| Document | Description |
+|----------|-------------|
+| [custom-upload.md](./custom-upload.md) | How to set up custom image upload endpoints |
+| [mp-card.md](./mp-card.md) | WeChat Mini Program card configuration |
+| [telegram-usage.md](./telegram-usage.md) | Setting up Telegram as image hosting |
+
+---
+
+## 🎯 Quick Start Paths
+
+### Path 1: I'm New Here 👶
+
+1. Read [getting-started.md](./getting-started.md) for an overview
+2. Try the [online editor](https://md.doocs.org)
+3. Reference [markdown-guide.md](./markdown-guide.md) while writing
+
+### Path 2: I Want to Write Better Articles ✍️
+
+1. Check [example-content.md](./example-content.md) for templates
+2. Learn advanced syntax from [markdown-guide.md](./markdown-guide.md)
+3. Experiment with custom CSS styling
+
+### Path 3: I Need Self-Hosting 🏠
+
+1. Follow Docker deployment in [getting-started.md](./getting-started.md)
+2. Configure your preferred [image hosting](./custom-upload.md)
+3. Set up [Telegram integration](./telegram-usage.md) (optional)
+
+---
+
+## 🌟 Featured Content
+
+### What's New
+
+- 🆕 **Getting Started Guide** - Complete onboarding for new users
+- 🆕 **Markdown Reference** - Comprehensive syntax documentation  
+- 🆕 **Example Templates** - Ready-to-use article templates
+
+### Popular Topics
+
+- 🐳 Docker deployment
+- 🖼️ Image hosting configuration
+- 🤖 AI integration setup
+- 📝 Markdown syntax tips
+
+---
+
+## 📝 Contributing to Documentation
+
+We welcome contributions! If you find errors or want to improve our docs:
+
+1. Fork the repository
+2. Make your changes
+3. Submit a pull request
+
+See our [Contributing Guide](../CONTRIBUTING.md) for details.
+
+---
+
+## 🔗 External Resources
+
+- [Main README](../README.md) - Project overview and features
+- [GitHub Issues](https://github.com/doocs/md/issues) - Bug reports and feature requests
+- [Discussions](https://github.com/doocs/md/discussions) - Community Q&A
+- [Online Editor](https://md.doocs.org) - Try it now!
+
+---
+
+## 🗂️ Document Status
+
+| Document | Last Updated | Status |
+|----------|--------------|--------|
+| getting-started.md | 2026-04-05 | ✅ Complete |
+| markdown-guide.md | 2026-04-05 | ✅ Complete |
+| example-content.md | 2026-04-05 | ✅ Complete |
+| custom-upload.md | 2026-03-26 | ✅ Stable |
+| mp-card.md | 2026-03-26 | ✅ Stable |
+| telegram-usage.md | 2026-03-26 | ✅ Stable |
+
+---
+
+*Need help? Check our [Getting Started Guide](./getting-started.md) or join our [community discussions](https://github.com/doocs/md/discussions)!*