# Docker Deployment Guide

## Overview

DigiServer v2 Docker image features:
- **Base image size**: ~400MB (optimized)
- **Full HD media support**: Images, videos, PDFs
- **Optional LibreOffice**: Install on-demand for PPTX support (+500MB)
- **Auto-initialization**: Database and admin user created on first run
- **Non-root user**: Runs as `appuser` (UID 1000) for security

## Quick Start

### 1. Build and Run with Docker Compose

```bash
# Build the Docker image
docker-compose build

# Start the container
docker-compose up -d

# View logs
docker-compose logs -f

# Stop the container
docker-compose down
```

The application will be available at `http://localhost:5000`

Default credentials:
- Username: `admin`
- Password: `admin123`

### 2. Build Docker Image Only

```bash
# Build the image
docker build -t digiserver-v2:latest .

# Run the container
docker run -d \
  -p 5000:5000 \
  -v $(pwd)/instance:/app/instance \
  -v $(pwd)/app/static/uploads:/app/app/static/uploads \
  --name digiserver \
  digiserver-v2:latest
```

## Configuration

### Environment Variables

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

```bash
cp .env.example .env
```

Edit the `.env` file to set your configuration:
- `SECRET_KEY`: Change to a random secret key
- `FLASK_ENV`: Set to `production` for production deployments

### Persistent Data

The following directories are mounted as volumes:
- `./instance`: Database storage
- `./app/static/uploads`: Uploaded media files

These persist even when containers are recreated.

## Production Deployment

### 1. Using Docker Compose (Recommended)

```bash
# Create .env file with production settings
cp .env.example .env
nano .env  # Edit with your settings

# Start in production mode
docker-compose up -d
```

### 2. Behind a Reverse Proxy (Nginx/Traefik)

Example Nginx configuration:

```nginx
server {
    listen 80;
    server_name yourdomain.com;

    location / {
        proxy_pass http://localhost:5000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # For large file uploads
        client_max_body_size 100M;
    }
}
```

### 3. Enable Redis Caching (Optional)

Uncomment the Redis service in `docker-compose.yml`:

```yaml
  redis:
    image: redis:7-alpine
    container_name: digiserver-redis
    restart: unless-stopped
    volumes:
      - redis-data:/data

volumes:
  redis-data:
```

Update `.env`:
```
REDIS_URL=redis://redis:6379/0
```

## Backup

### Database Backup

```bash
# Backup database
docker exec digiserver tar -czf /tmp/backup.tar.gz /app/instance
docker cp digiserver:/tmp/backup.tar.gz ./backup-$(date +%Y%m%d).tar.gz
```

### Full Backup (Database + Uploads)

```bash
# Backup everything
tar -czf digiserver-backup-$(date +%Y%m%d).tar.gz instance/ app/static/uploads/
```

## Maintenance

### View Logs

```bash
# All logs
docker-compose logs -f

# Last 100 lines
docker-compose logs --tail=100

# Specific service
docker-compose logs -f digiserver
```

### Update Application

```bash
# Pull latest code
git pull

# Rebuild and restart
docker-compose down
docker-compose build
docker-compose up -d
```

### Shell Access

```bash
# Access container shell
docker-compose exec digiserver bash

# Or with docker directly
docker exec -it digiserver bash
```

### Installing Optional Dependencies

**LibreOffice for PowerPoint Support:**

```bash
# Method 1: Via Web UI (Recommended)
# Navigate to Admin Panel → System Dependencies
# Click "Install LibreOffice" button

# Method 2: Via Docker exec
docker exec -it digiserver bash
sudo /app/install_libreoffice.sh
exit

# Verify installation
docker exec digiserver libreoffice --version
```

## Troubleshooting

### Port Already in Use

Change the port mapping in `docker-compose.yml`:
```yaml
ports:
  - "8080:5000"  # Change 8080 to your desired port
```

### Permission Issues

Ensure the volumes have correct permissions:
```bash
sudo chown -R 1000:1000 instance/ app/static/uploads/
```

### Container Won't Start

Check logs:
```bash
docker-compose logs digiserver
```

### Reset Database

```bash
# Stop containers
docker-compose down

# Remove database
rm instance/*.db

# Start fresh
docker-compose up -d
```

## System Requirements

### Base Image
- Docker 20.10+
- Docker Compose 2.0+
- 1GB RAM minimum (2GB recommended)
- 5GB disk space (base + uploads)

### With LibreOffice (Optional)
- 2GB RAM recommended
- 10GB disk space (includes LibreOffice + media)

## Security Recommendations

1. **Change default credentials** immediately after first login
2. **Set a strong SECRET_KEY** in `.env`
3. **Use HTTPS** with a reverse proxy in production
4. **Regular backups** of database and uploads
5. **Update regularly** to get security patches
6. **Restrict network access** using firewall rules
7. **Monitor logs** for suspicious activity

## Performance Tuning

### Adjust Workers

Edit `Dockerfile` CMD line:
```dockerfile
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "8", "--timeout", "120", "app.app:create_app()"]
```

### Resource Limits

Add to `docker-compose.yml`:
```yaml
services:
  digiserver:
    # ... existing config ...
    deploy:
      resources:
        limits:
          cpus: '2'
          memory: 2G
        reservations:
          cpus: '1'
          memory: 1G
```