NestJS Node Config Module

$3

Node.js Application Configuration organizes hierarchical configurations
for your app deployments.

It lets you define a set of default parameters, and extend them for different deployment environments (development, qa,
staging, production, etc.).

#### Installation

To start using Node Config module, first install the required packages:

``bash
$ npm i --save config nestjs-node-config-module
`

#### Overview

To use the config module, add ConfigModule import:

`typescript
import { ConfigModule } from "nestjs-node-config-module";

@Module({
imports: [ConfigModule.forRoot()],
controllers: [],
providers: [],
})
export class AppModule {
}
`

Then you can inject config service:

`typescript
import { ConfigService } from "nestjs-node-config-module";

@Injectable()
export class AppService {
constructor(private configService: ConfigService) {
}

getFoo(): string {
return this.configService.get('foo');
}
}
`

#### Options

Config module accepts optional options parameter, parameters are described below:

$3

You can extend default config service with your one, for example:

`typescript
import { ConfigService } from "nestjs-node-config-module";

@Injectable()
class MyConfigService extends ConfigService {
getFoo(): string {
return this.get('foo')
}
}
`

Then you have to register it by passing class to Config Module:

`typescript
import { ConfigModule } from "nestjs-node-config-module";

@Module({
imports: [ConfigModule.forRoot({
configService: MyConfigService
})],
controllers: [],
providers: [],
})
export class AppModule {
}
`

And now it's accessible in nest IoC container:

`typescript
import { MyConfigService } from "./my-config.service";

@Injectable()
export class AppService {
constructor(private configService: MyConfigService) {
}

getFoo(): string {
return this.configService.getFoo();
}
}
`

NOTE: default ConfigService` is still available and can be injected.