# Docker Setup Summary

## Completed Tasks

All Docker setup tasks have been successfully completed for the Feuerwehr Dashboard project.

## Files Created

### 1. Backend Dockerfile
**Location:** `/Users/matthias/work/feuerwehr_dashboard/backend/Dockerfile`
- Multi-stage build (builder + production)
- Base image: node:20-alpine
- Build stage: Installs deps, compiles TypeScript
- Production stage: Only production deps, non-root user
- Copies migrations folder to dist/
- Health check: wget localhost:3000/health
- Exposes port 3000
- CMD: node dist/server.js
- **Lines:** 69

### 2. Backend .dockerignore
**Location:** `/Users/matthias/work/feuerwehr_dashboard/backend/.dockerignore`
- Excludes node_modules, dist, .env, logs
- Excludes IDE files, git files, documentation
- Optimizes build context size

### 3. Frontend Dockerfile
**Location:** `/Users/matthias/work/feuerwehr_dashboard/frontend/Dockerfile`
- Multi-stage build (builder + nginx)
- Builder: node:20-alpine, runs Vite build
- Production: nginx:alpine, serves static assets
- Build arguments: VITE_API_URL, VITE_APP_NAME, VITE_APP_VERSION
- Non-root nginx user
- Health check: wget localhost:80/health
- Exposes port 80
- CMD: nginx -g "daemon off;"
- **Lines:** 68

### 4. Frontend .dockerignore
**Location:** `/Users/matthias/work/feuerwehr_dashboard/frontend/.dockerignore`
- Excludes node_modules, dist, .env
- Excludes IDE files, git files, documentation
- Optimizes build context size

### 5. Nginx Configuration
**Location:** `/Users/matthias/work/feuerwehr_dashboard/frontend/nginx.conf`
- SPA routing: try_files with fallback to index.html
- Gzip compression enabled
- Static assets cached for 1 year
- index.html not cached
- Security headers:
  - X-Frame-Options: SAMEORIGIN
  - X-Content-Type-Options: nosniff
  - X-XSS-Protection: 1; mode=block
  - Referrer-Policy: strict-origin-when-cross-origin
- Health check endpoint: /health
- Custom error pages
- **Lines:** 99

### 6. Updated docker-compose.yml
**Location:** `/Users/matthias/work/feuerwehr_dashboard/docker-compose.yml`
- Fixed backend PORT environment variable (hardcoded to 3000)
- Fixed backend port mapping (maps to container port 3000)
- Fixed health check URL (uses container port 3000)
- All services have proper health checks
- Proper depends_on with health conditions
- Volume for postgres data persistence
- Bridge network for service communication
- Restart policies: unless-stopped

### 7. Docker Test Script
**Location:** `/Users/matthias/work/feuerwehr_dashboard/docker-test.sh`
- Checks Docker availability
- Tests backend image build
- Tests frontend image build
- Reports image sizes
- Option to cleanup test images
- Provides next steps
- **Lines:** 250
- **Executable:** Yes

### 8. Docker Validation Script
**Location:** `/Users/matthias/work/feuerwehr_dashboard/docker-validate.sh`
- Validates all Docker files exist
- Checks file permissions
- Reports missing files
- **Executable:** Yes

### 9. Docker Setup Documentation
**Location:** `/Users/matthias/work/feuerwehr_dashboard/DOCKER_SETUP.md`
- Comprehensive Docker setup guide
- Architecture overview
- Build instructions
- Security considerations
- Troubleshooting guide
- Production deployment guide

## Docker Build Status

**Note:** Docker is not available on this system, so builds could not be tested automatically.

### To Test Builds

When Docker is available, run:

```bash
cd /Users/matthias/work/feuerwehr_dashboard
./docker-test.sh
```

This will:
1. Verify Docker is running
2. Build backend image (tag: feuerwehr-backend-test:latest)
3. Build frontend image (tag: feuerwehr-frontend-test:latest)
4. Report image sizes
5. Optionally cleanup test images

### Manual Build Testing

#### Backend
```bash
cd /Users/matthias/work/feuerwehr_dashboard/backend
docker build -t feuerwehr-backend:latest .
```

Expected size: ~150-200 MB

#### Frontend
```bash
cd /Users/matthias/work/feuerwehr_dashboard/frontend
docker build \
  --build-arg VITE_API_URL=http://localhost:3000 \
  --build-arg VITE_APP_NAME="Feuerwehr Dashboard" \
  --build-arg VITE_APP_VERSION="1.0.0" \
  -t feuerwehr-frontend:latest .
```

Expected size: ~50-80 MB

## Docker Compose Services

### PostgreSQL
- Image: postgres:16-alpine
- Port: 5432
- Volume: postgres_data_prod (persistent)
- Health check: pg_isready
- Restart: unless-stopped

### Backend
- Build: ./backend
- Port: 3000
- Depends on: postgres (healthy)
- Health check: wget localhost:3000/health
- Restart: unless-stopped

### Frontend
- Build: ./frontend
- Port: 80
- Depends on: backend (healthy)
- Health check: wget localhost:80/health
- Restart: unless-stopped

## Environment Variables

Create `.env` file based on `.env.example`:

### Required Variables
```bash
POSTGRES_PASSWORD=your_secure_password
JWT_SECRET=your_jwt_secret_min_32_chars
```

### Optional Variables (with defaults)
```bash
POSTGRES_DB=feuerwehr_prod
POSTGRES_USER=prod_user
POSTGRES_PORT=5432
BACKEND_PORT=3000
FRONTEND_PORT=80
CORS_ORIGIN=http://localhost:80
VITE_API_URL=http://localhost:3000
```

## Quick Start Guide

### 1. Validate Setup
```bash
cd /Users/matthias/work/feuerwehr_dashboard
./docker-validate.sh
```

### 2. Configure Environment
```bash
cp .env.example .env
# Edit .env and set POSTGRES_PASSWORD and JWT_SECRET
```

### 3. Test Builds (Optional)
```bash
./docker-test.sh
```

### 4. Start Services
```bash
docker-compose up -d
```

### 5. Check Status
```bash
docker-compose ps
docker-compose logs -f
```

### 6. Access Application
- Frontend: http://localhost:80
- Backend: http://localhost:3000
- Database: localhost:5432

## Security Features

### Backend
- Non-root user execution (nodejs:1001)
- Alpine Linux base (minimal attack surface)
- Only production dependencies
- No source code in final image
- Health checks enabled
- wget installed for monitoring

### Frontend
- Non-root nginx execution
- Alpine Linux base
- Security headers configured
- Static assets only in final image
- Gzip compression
- Proper cache headers
- Health checks enabled

## Image Optimization

### Multi-Stage Builds
- Separate build and production stages
- Smaller final images
- No build tools in production

### Layer Caching
- Package files copied first
- Dependencies installed before source
- Optimized build times

### .dockerignore
- Excludes unnecessary files
- Reduces build context
- Faster builds

## Health Checks

All services include Docker health checks:

### PostgreSQL
- Interval: 10s
- Retries: 5
- Start period: 10s

### Backend
- Endpoint: /health
- Interval: 30s
- Retries: 3
- Start period: 40s

### Frontend
- Endpoint: /health
- Interval: 30s
- Retries: 3
- Start period: 30s

## Production Considerations

### Before Deployment
- [ ] Set strong POSTGRES_PASSWORD (min 16 chars)
- [ ] Set strong JWT_SECRET (min 32 chars)
- [ ] Configure CORS_ORIGIN to production domain
- [ ] Set VITE_API_URL to production API URL
- [ ] Enable HTTPS/SSL
- [ ] Configure firewall rules
- [ ] Set up monitoring
- [ ] Configure backup strategy

### Resource Limits
Consider adding resource limits in docker-compose.yml:

```yaml
deploy:
  resources:
    limits:
      cpus: '1.0'
      memory: 512M
```

### Monitoring
```bash
# View container stats
docker stats

# View logs
docker-compose logs -f

# Check health
docker-compose ps
```

## Troubleshooting

### Build Fails

1. **Check Docker is running:**
   ```bash
   docker info
   ```

2. **View build output:**
   ```bash
   docker-compose build --no-cache
   ```

3. **Check individual service:**
   ```bash
   cd backend  # or frontend
   docker build -t test .
   ```

### Container Won't Start

1. **Check logs:**
   ```bash
   docker-compose logs [service]
   ```

2. **Check health:**
   ```bash
   docker-compose ps
   ```

3. **Verify environment:**
   ```bash
   docker-compose config
   ```

### Database Connection Issues

1. **Verify postgres is healthy:**
   ```bash
   docker-compose ps postgres
   ```

2. **Check DATABASE_URL format:**
   ```
   postgresql://user:password@postgres:5432/database
   ```

3. **Test connection:**
   ```bash
   docker-compose exec backend ping postgres
   ```

## Next Steps

1. **Install Docker** (if not already installed)
   - macOS: Docker Desktop for Mac
   - Linux: Docker Engine
   - Windows: Docker Desktop for Windows

2. **Test Docker Setup**
   ```bash
   ./docker-test.sh
   ```

3. **Configure Environment**
   - Copy .env.example to .env
   - Set required variables

4. **Deploy Application**
   ```bash
   docker-compose up -d
   ```

5. **Monitor Services**
   ```bash
   docker-compose logs -f
   docker-compose ps
   ```

## Additional Resources

- [Docker Setup Documentation](DOCKER_SETUP.md) - Comprehensive guide
- [Backend Dockerfile](backend/Dockerfile) - Backend image definition
- [Frontend Dockerfile](frontend/Dockerfile) - Frontend image definition
- [Nginx Config](frontend/nginx.conf) - Web server configuration
- [Docker Compose](docker-compose.yml) - Service orchestration

## File Locations

All files are in the project root: `/Users/matthias/work/feuerwehr_dashboard/`

```
/Users/matthias/work/feuerwehr_dashboard/
├── backend/
│   ├── Dockerfile              # Backend image (69 lines)
│   └── .dockerignore           # Backend ignore rules
├── frontend/
│   ├── Dockerfile              # Frontend image (68 lines)
│   ├── nginx.conf              # Nginx config (99 lines)
│   └── .dockerignore           # Frontend ignore rules
├── docker-compose.yml          # Service orchestration (updated)
├── docker-test.sh              # Build test script (250 lines)
├── docker-validate.sh          # Validation script
├── DOCKER_SETUP.md             # Comprehensive documentation
└── SUMMARY.md                  # This file
```

## Validation Results

All Docker files have been validated:

```
✓ backend/Dockerfile exists
✓ backend/.dockerignore exists
✓ frontend/Dockerfile exists
✓ frontend/.dockerignore exists
✓ frontend/nginx.conf exists
✓ docker-compose.yml exists
✓ docker-test.sh exists and is executable
```

## Summary

The production-ready Docker setup is complete with:

- **Multi-stage builds** for optimized image sizes
- **Security best practices** (non-root users, Alpine base)
- **Health checks** for all services
- **Layer caching** optimization
- **SPA routing** with Nginx
- **Gzip compression** and cache headers
- **Security headers** configured
- **Test scripts** for validation
- **Comprehensive documentation**

The application is ready for Docker deployment once Docker is installed and environment variables are configured.
