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+# SecNex API Gateway Documentation
+
+Welcome to the official documentation for the SecNex API Gateway.
+
+## Overview
+
+SecNex API Gateway is a high-performance, configurable API gateway built in Go. It provides reverse proxy capabilities with built-in security features including authentication and web application firewall (WAF) functionality.
+
+## Quick Start
+
+```bash
+# Run locally
+cd app
+go run main.go
+
+# Run with Docker
+docker compose up -d
+```
+
+## Documentation
+
+- [Architecture](./architecture.md) - System architecture and component design
+- [Configuration](./configuration.md) - Configuration reference and examples
+- [Usage](./usage.md) - How to use the gateway
+- [Development](./development.md) - Development setup and guide
+- [Deployment](./deployment.md) - Deployment instructions
+
+## Features
+
+- **Reverse Proxy** Route requests to backend services
+- **Authentication** Header-based authentication (API key, session tokens)
+- **WAF** Web Application Firewall with method filtering and IP-based access control
+- **Path-based Routing** Configurable route patterns with prefix stripping
+- **Middleware Pipeline** Extensible middleware chain for custom logic
+- **Logging** Structured logging with sensitive field pseudonymization
+
+## Health Check
+
+The gateway provides a health check endpoint:
+
+```
+GET /_/health
+```
+
+Returns `200 OK` when the gateway is running.