Restore missing project configuration files

Restored all configuration and documentation files that were missing:
- devenv.nix and devenv.lock for development environment
- README.md, CLAUDE.md, DOCKER.md, WARP.md for documentation
- alembic.ini for database migrations
- requirements.txt for Python dependencies
- Dockerfile, docker-compose.yml, entrypoint.sh for containerization
- build.sh for build automation
- pytest.ini for test configuration

All database concurrency improvements and logging fixes remain intact.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

DOCKER.md

@@ -0,0 +1,112 @@
+# DosVault Docker Deployment
+
+## Quick Start
+
+1. **Copy the environment template:**
+   ```bash
+   cp .env.example .env
+   ```
+
+2. **Edit `.env` with your configuration:**
+   - Set `IGDB_CLIENT_ID` and `IGDB_SECRET_KEY` (required)
+   - Set `ROMS_PATH` to your ROM collection directory
+	 - Set `DOSVAULT_ADMIN_USERNAME` to you admin username
+	 - Set `DOSVAULT_ADMIN_EMAIL` to your admin email
+	 - Set `DOSVAULT_ADMIN_PASSWORD` to your admin password
+   - Optionally customize host/port settings
+
+3. **Start the application:**
+   ```bash
+   docker-compose up -d
+   ```
+
+4. **Create admin user:**
+   ```bash
+   docker-compose exec dosvault python src/create_admin.py
+   ```
+
+5. **Access the application:**
+   - Web interface: http://localhost:8080
+   - Admin panel: http://localhost:8080/admin
+
+## Configuration
+
+### Environment Variables
+
+| Variable | Required | Description |
+|----------|----------|-------------|
+| `IGDB_CLIENT_ID` | Yes | Twitch API Client ID |
+| `IGDB_SECRET_KEY` | Yes | Twitch API Client Secret |
+| `ROMS_PATH` | No | Path to ROM collection (default: ./roms) |
+| `DOSFRONTEND_CONFIG_DIR` | No | Application data directory (default: /app/data) |
+
+### Configuration Persistence
+
+Configuration changes made through the web interface are automatically persisted to the mounted volume:
+
+- **In Docker**: Configuration is stored in `/app/data/config.json` (mounted volume)
+- **Regular install**: Configuration is stored in `~/.config/dosfrontend/config.json`
+- **File structure**: All application data uses the same base directory:
+  - `config.json` - Main configuration file
+  - `roms.db` - SQLite database
+  - `images/` - Downloaded game artwork
+  - `logs/` - Application logs
+
+### Volume Mounts
+
+- `dosvault_data:/app/data` - Application data (database, images, logs)
+- `${ROMS_PATH}:/app/data/roms:ro` - ROM collection (read-only)
+
+## Database Management
+
+### Initialize Database
+```bash
+docker-compose exec dosvault python src/migrate.py init
+```
+
+### Run Migrations
+```bash
+docker-compose exec dosvault python src/migrate.py upgrade
+```
+
+### Scrape ROM Metadata
+```bash
+docker-compose exec dosvault python -m src
+```
+
+## Maintenance
+
+### View Logs
+```bash
+docker-compose logs -f dosvault
+```
+
+### Backup Database
+```bash
+docker-compose exec dosvault cp /app/data/roms.db /app/data/backup.db
+docker cp $(docker-compose ps -q dosvault):/app/data/backup.db ./backup.db
+```
+
+### Update Application
+```bash
+docker-compose pull
+docker-compose up -d
+```
+
+## Troubleshooting
+
+### Check Container Health
+```bash
+docker-compose ps
+```
+
+### Access Container Shell
+```bash
+docker-compose exec dosvault bash
+```
+
+### Reset Data
+```bash
+docker-compose down -v
+docker-compose up -d
+```