added mail module

backend/package.json

@@ -31,6 +31,7 @@
     "@nestjs/platform-express": "^10.0.0",
     "@nestjs/swagger": "^7.3.1",
     "@nestjs/typeorm": "^10.0.2",
+    "@sendgrid/mail": "^8.1.3",
     "argon2": "^0.40.1",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",

backend/src/app.module.ts

@@ -10,6 +10,7 @@ import { SecurityHeadersMiddleware } from './middleware/security-middleware/secu
 import { AuthModule } from './modules/auth-module/auth.module';
 import { AccessTokenGuard } from './modules/auth-module/common/guards';
 import { DatabaseModule } from './modules/database-module/database.module';
+import { SendgridModule } from './modules/sendgrid-module/sendgrid.module';
 import { UserModule } from './modules/user-module/user.module';
 
 @Module({
@@ -20,6 +21,7 @@ import { UserModule } from './modules/user-module/user.module';
     DatabaseModule,
     AuthModule,
     UserModule,
+    SendgridModule,
   ],
   controllers: [AppController],
   providers: [AppService, { provide: 'APP_GUARD', useClass: AccessTokenGuard }],

backend/src/modules/sendgrid-module/sendgrid.module.ts

@@ -0,0 +1,20 @@
+import { Module } from '@nestjs/common';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+
+import { MailService } from './services/mail.service';
+
+@Module({
+  imports: [ConfigModule],
+  providers: [
+    MailService,
+    {
+      provide: 'SEND_GRID_API_KEY',
+      useFactory: (configService: ConfigService): string =>
+        configService.get<string>('SEND_GRID_API_KEY'),
+      inject: [ConfigService],
+    },
+  ],
+  controllers: [],
+  exports: [MailService],
+})
+export class SendgridModule {}

backend/src/modules/sendgrid-module/services/mail.service.ts

@@ -0,0 +1,11 @@
+import { Inject, Injectable } from '@nestjs/common';
+import * as sendGrindMailApi from '@sendgrid/mail';
+
+@Injectable()
+export class MailService {
+  public constructor(
+    @Inject('SEND_GRID_API_KEY') private readonly apiKey: string
+  ) {
+    sendGrindMailApi.setApiKey(this.apiKey);
+  }
+}