No new in service

Constructor injection in service

@Injectable on NotificationsService

@Injectable on SmsService

@Injectable on EmailService

Controller delegates to service

No Request/Response in service

Providers registered in module

Response envelope

No new in controller

@ValidateNested present

@Type present

whitelist: true

transform: true

forbidNonWhitelisted: true

Global pipe in main.ts

POST response envelope

GET response envelope

Feature module structure

Constructor injection

@Injectable on service

Response data envelope

Error envelope shape

console.error for unknown errors

ConfigModule isGlobal

No process.env in service

No new EmailService

Test.createTestingModule used

Dependencies mocked in tests

Global ValidationPipe

Global filter in main.ts

Catch-all filter decorator

DTO with class-validator

@Catch() no args

HttpException error shape

Unknown error shape

console.error for unknown

Global filter in main.ts

Implements ExceptionFilter

HttpException status code

500 for unknown

Filter file location

ValidationPipe global

Error envelope shape

Response data envelope

console.error for unknown errors

Global ValidationPipe with whitelist and transform

Performance logging interceptor with tap

Interceptor logs method URL duration

Catch-all filter decorator

Global filter in main.ts

DTO with class-validator decorators

Feature module structure

Filter in common/filters