# Common Defaults

Default configurations applied to all deployment modes.

## Files

### `server-defaults.ncl`

Default HTTP server configuration:
- Host: `0.0.0.0`
- Port: `8080`
- Workers: `4`
- Request timeout: `30000ms`
- Max connections: `1000`
- Graceful shutdown: `true`

### `database-defaults.ncl`

Default database configuration:
- URL: `ws://localhost:8000`
- Username: `root`
- Database: `vapora`
- Pool size: `20`
- Connection timeout: `30s`

### `monitoring-defaults.ncl`

Default monitoring configuration:
- Prometheus disabled
- Log level: `info`
- Tracing disabled
- Metrics path: `/metrics`

## Usage

Import common defaults in deployment configs:

```nickel
let server_defaults = import "common/server-defaults.ncl" in
let db_defaults = import "common/database-defaults.ncl" in

# In deployment config
{
  backend = std.record.merge server_defaults {
    workers = 8,  # Override workers
  },

  database = db_defaults,  # Use as-is
}
```

## Pattern

Common defaults are merged with mode-specific overrides:

```
Common Defaults
      ↓
Mode Defaults (override)
      ↓
User Customizations (override)
      ↓
Final Config
```

## References

- Parent: `../README.md`
- Deployment modes: `../deployment/README.md`