feat: Implement email service with welcome, password reset, and verification templates, and add application logo.

src/main.ts

@@ -1,5 +1,5 @@
 import { NestFactory } from '@nestjs/core';
-import { ValidationPipe, Logger } from '@nestjs/common';
+import { ValidationPipe, Logger, BadRequestException } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
 import helmet from 'helmet';
@@ -41,6 +41,21 @@ async function bootstrap() {
       transformOptions: {
         enableImplicitConversion: true,
       },
+      exceptionFactory: (errors) => {
+        const messages = errors.map((error) => {
+          const constraints = error.constraints
+            ? Object.values(error.constraints)
+            : [`${error.property} is invalid`];
+          return {
+            field: error.property,
+            errors: constraints,
+          };
+        });
+        return new BadRequestException({
+          message: 'Validation failed',
+          errors: messages,
+        });
+      },
     }),
   );