# Phase 2.1: Backend Project Initialization - COMPLETE

## Date: 2026-02-14

## Summary

Successfully initialized the Rust backend project with Docker containerization, development and production configurations, and verified the build.

## Files Created

### Backend Configuration
- **backend/Cargo.toml** - Rust project dependencies
- **backend/src/main.rs** - Axum server with health/ready endpoints
- **backend/.env.example** - Environment variable template
- **backend/defaults.env** - Default environment values

### Docker Configuration
- **backend/docker/Dockerfile** - Production multi-stage build (Alpine-based)
- **backend/docker/Dockerfile.dev** - Development build with hot reload
- **backend/docker-compose.yml** - Production deployment
- **backend/docker-compose.dev.yml** - Development deployment

### Project Structure
- **backend/** - Rust backend
- **mobile/** - React Native (iOS + Android) - to be created
- **web/** - React web app - to be created
- **shared/** - Shared TypeScript code - to be created
- **thoughts/research/** - Research documentation

## Deployment Configuration

### Resource Limits (Homelab)
- CPU: 1.0 core (limit), 0.25 core (reservation)
- RAM: 1000MB (limit), 256MB (reservation)
- MongoDB: 512MB RAM, 0.5 CPU

### Port Configuration
- Backend API: 6000 (host) → 8000 (container)
- MongoDB: 27017 (standard port)
- Future services: 6001-6999 range

### Docker Features
- Multi-stage build for optimized image size
- Non-root user (normogen:1000)
- Health checks (liveness and readiness)
- Volume persistence for MongoDB
- Custom bridge network (normogen-network)
- Hot reload for development

### Reverse Proxy Ready
- Backend runs HTTP only on port 8000
- TLS/HTTPS handled by reverse proxy
- CORS configurable via environment

## Build Verification

```bash
cd backend
cargo check
# Finished dev profile [unoptimized + debuginfo] target(s) in 24.94s
```

## Dependencies Added

### Core Framework
- axum 0.7 - Web framework
- tokio 1.x - Async runtime
- tower 0.4 - Middleware
- tower-http 0.5 - HTTP middleware (CORS, trace, limit, decompression)

### Database & Auth
- mongodb 2.8 - MongoDB driver
- jsonwebtoken 9 - JWT authentication
- pbkdf2 0.12 - Password key derivation
- sha2 0.10 - Hashing
- rand 0.8 - Random generation

### Serialization & Validation
- serde 1 - Serialization
- serde_json 1 - JSON
- validator 0.16 - Input validation

### Utilities
- uuid 1 - Unique identifiers
- chrono 0.4 - Date/time
- tracing 0.1 - Logging
- tracing-subscriber 0.3 - Log subscribers
- dotenv 0.15 - Environment variables
- anyhow 1 - Error handling
- thiserror 1 - Error derive

## Health Endpoints

- **GET /health** - Liveness probe
  ```json
  {
    "status": "ok",
    "timestamp": "2026-02-14T15:29:00Z"
  }
  ```

- **GET /ready** - Readiness probe
  ```json
  {
    "status": "ready",
    "database": "not_connected",
    "timestamp": "2026-02-14T15:29:00Z"
  }
  ```

## Quick Start Commands

### Development
```bash
cd backend
cp .env.example .env
# Edit .env
docker compose -f docker-compose.dev.yml up -d
docker compose -f docker-compose.dev.yml logs -f backend
```

### Production
```bash
cd backend
cp .env.example .env
openssl rand -base64 32  # Generate JWT secret
# Edit .env with generated secret
docker compose build
docker compose up -d
curl http://localhost:6000/health
```

## Next Steps

- **Phase 2.2**: MongoDB connection and models
- **Phase 2.3**: Configuration management (struct + env loading)
- **Phase 2.4**: JWT authentication implementation
- **Phase 2.5**: User registration and login endpoints
- **Phase 2.6**: Password recovery with recovery phrases

## Repository Ready

The monorepo structure is ready with separate directories:
- backend/ (Rust)
- mobile/ (React Native - to be created)
- web/ (React - to be created)
- shared/ (TypeScript - to be created)

All platforms will share common code through the shared/ directory.