Add GitHub MCP Server setup instructions

.devcontainer/devcontainer.json

@@ -0,0 +1,67 @@
+{
+  "image": "mcr.microsoft.com/devcontainers/universal:2"
+}
+### Docker Configuration
+
+```json
+{
+  "mcpServers": {
+    "github": {
+      "command": "docker",
+      "args": [
+        "run",
+        "-i",
+        "--rm",
+        "-e",
+        "GITHUB_PERSONAL_ACCESS_TOKEN",
+        "ghcr.io/github/github-mcp-server"
+      ],
+      "env": {
+        "GITHUB_PERSONAL_ACCESS_TOKEN": "YOUR_GITHUB_PAT"
+      }
+    }
+  }
+}
+```
+
+> **Important**: The npm package `@modelcontextprotocol/server-github` is no longer supported as of April 2025. Use the official Docker image `ghcr.io/github/github-mcp-server` instead.
+
+## Configuration Files
+
+- **Global (all projects)**: `~/.cursor/mcp.json`
+- **Project-specific**: `.cursor/mcp.json` in project root
+
+## Verify Installation
+
+1. Restart Cursor completely
+2. Check for green dot in Settings → Tools & Integrations → MCP Tools
+3. In chat/composer, check "Available Tools"
+4. Test with: "List my GitHub repositories"
+
+## Troubleshooting
+
+### Remote Server Issues
+
+- **Streamable HTTP not working**: Ensure you're using Cursor v0.48.0 or later
+- **Authentication failures**: Verify PAT has correct scopes
+- **Connection errors**: Check firewall/proxy settings
+
+### Local Server Issues
+
+- **Docker errors**: Ensure Docker Desktop is running
+- **Image pull failures**: Try `docker logout ghcr.io` then retry
+- **Docker not found**: Install Docker Desktop and ensure it's running
+
+### General Issues
+
+- **MCP not loading**: Restart Cursor completely after configuration
+- **Invalid JSON**: Validate that json format is correct
+- **Tools not appearing**: Check server shows green dot in MCP settings
+- **Check logs**: Look for MCP-related errors in Cursor logs
+
+## Important Notes
+
+- **Docker image**: `ghcr.io/github/github-mcp-server` (official and supported)
+- **npm package**: `@modelcontextprotocol/server-github` (deprecated as of April 2025 - no longer functional)
+- **Cursor specifics**: Supports both project and global configurations, uses `mcpServers` key}
+}