docs(onboarding): improve new user experience + fix OpenPanel tools

- Add DOCKER_README.md for Docker Hub overview page
- Fix docker-compose.yaml port mapping for local users ("8000:8000")
- Add "Verify It Works" section with dashboard URL to README
- Restructure env.example with clear REQUIRED section
- Add post-Docker verification checklist to getting-started.md
- Fix 4 OpenPanel tools: parameter ordering (non-default before default)
- Rebrand all "Coolify Projects" to "MCP Hub" in server and Dockerfile
- Make MCP namespace prefix stripping generic

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

DOCKER_README.md

@@ -0,0 +1,124 @@
+# MCP Hub
+
+**The AI-native management hub for WordPress, WooCommerce, and self-hosted services.**
+
+589 tools across 9 plugins. Connect your sites, stores, repos, and databases — manage them all through Claude, ChatGPT, Cursor, or any MCP client.
+
+## Quick Start
+
+### 1. Create a `.env` file
+
+```bash
+# Required
+MASTER_API_KEY=your-secure-key-here
+
+# Add at least one WordPress site
+WORDPRESS_SITE1_URL=https://your-site.com
+WORDPRESS_SITE1_USERNAME=admin
+WORDPRESS_SITE1_APP_PASSWORD=xxxx xxxx xxxx xxxx
+WORDPRESS_SITE1_ALIAS=mysite
+```
+
+### 2. Run the container
+
+```bash
+docker run -d \
+  --name mcphub \
+  -p 8000:8000 \
+  --env-file .env \
+  airano/mcphub:latest
+```
+
+### 3. Verify it works
+
+```bash
+# Health check (wait ~30 seconds for startup)
+curl http://localhost:8000/health
+
+# Open the web dashboard
+# http://localhost:8000/dashboard
+```
+
+### 4. Connect your AI client
+
+In Claude Desktop's `claude_desktop_config.json`:
+
+```json
+{
+  "mcpServers": {
+    "mcphub": {
+      "url": "http://localhost:8000/mcp",
+      "headers": {
+        "Authorization": "Bearer your-secure-key-here"
+      }
+    }
+  }
+}
+```
+
+## Using Docker Compose
+
+```yaml
+services:
+  mcphub:
+    image: airano/mcphub:latest
+    ports:
+      - "8000:8000"
+    env_file:
+      - .env
+    volumes:
+      - mcphub-data:/app/data
+      - mcphub-logs:/app/logs
+    restart: unless-stopped
+
+volumes:
+  mcphub-data:
+  mcphub-logs:
+```
+
+```bash
+docker compose up -d
+```
+
+## After Starting
+
+| URL | Description |
+|-----|-------------|
+| `http://localhost:8000/health` | Health check & status |
+| `http://localhost:8000/dashboard` | Web dashboard (manage API keys, view sites, health) |
+| `http://localhost:8000/mcp` | MCP endpoint (connect AI clients here) |
+
+## Environment Variables
+
+| Variable | Required | Description |
+|----------|----------|-------------|
+| `MASTER_API_KEY` | **Yes** | API key for authentication |
+| `WORDPRESS_SITE1_URL` | For WP | WordPress site URL |
+| `WORDPRESS_SITE1_USERNAME` | For WP | WordPress admin username |
+| `WORDPRESS_SITE1_APP_PASSWORD` | For WP | WordPress Application Password |
+| `WORDPRESS_SITE1_ALIAS` | Recommended | Friendly name (e.g., `myblog`) |
+| `OAUTH_JWT_SECRET_KEY` | For OAuth | JWT secret for ChatGPT/Claude auto-registration |
+| `OAUTH_BASE_URL` | For OAuth | Public URL of your server |
+
+Add more sites with `SITE2`, `SITE3`, etc. See [full configuration guide](https://github.com/airano-ir/mcphub/blob/main/docs/getting-started.md).
+
+## Supported Plugins
+
+| Plugin | Tools | Env Prefix |
+|--------|-------|------------|
+| WordPress | 67 | `WORDPRESS_` |
+| WooCommerce | 28 | `WOOCOMMERCE_` |
+| WordPress Advanced | 22 | `WORDPRESS_` |
+| Gitea | 56 | `GITEA_` |
+| n8n | 56 | `N8N_` |
+| Supabase | 70 | `SUPABASE_` |
+| OpenPanel | 73 | `OPENPANEL_` |
+| Appwrite | 100 | `APPWRITE_` |
+| Directus | 100 | `DIRECTUS_` |
+
+## Links
+
+- **GitHub**: [github.com/airano-ir/mcphub](https://github.com/airano-ir/mcphub)
+- **PyPI**: [pypi.org/project/mcphub-server](https://pypi.org/project/mcphub-server/)
+- **Documentation**: [Getting Started Guide](https://github.com/airano-ir/mcphub/blob/main/docs/getting-started.md)
+- **License**: MIT