docs(nestjs): Update nestjs sdk docs with new setup (#10784)

Author: nicohrubec

platform-includes/getting-started-use/javascript.nestjs.mdx

@@ -1,24 +1,53 @@
-```javascript {filename: main.ts} {17}
+```javascript {filename: main.ts}
 // Import this first!
 import './instrument';
 
 // Now import other modules
-import * as Sentry from "@sentry/nestjs";
-import {
-  BaseExceptionFilter,
-  HttpAdapterHost,
-  NestFactory
-} from '@nestjs/core';
+import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  const { httpAdapter } = app.get(HttpAdapterHost);
-
-  Sentry.setupNestErrorHandler(app, new BaseExceptionFilter(httpAdapter));
-
   await app.listen(3000);
 }
 
 bootstrap();
 ```
+
+Then you can add the SentryModule as a root module:
+
+<Note>The SentryModule needs to be registered before any other module that should be instrumented by Sentry.</Note>
+
+```javascript {filename: app.module.ts} {2, 8}
+import { Module } from '@nestjs/common';
+import { SentryModule } from '@sentry/nestjs/setup';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+@Module({
+  imports: [
+      SentryModule.forRoot(),
+      // ...other modules
+  ],
+  controllers: [AppController],
+  providers: [AppService],
+})
+export class AppModule {}
+```
+
+By default, exceptions with status code 4xx are not sent to Sentry. If you still want to capture these exceptions, you can do so manually with `Sentry.captureException()`:
+
+```javascript {11}
+import { ArgumentsHost, BadRequestException, Catch } from '@nestjs/common';
+import { BaseExceptionFilter } from '@nestjs/core';
+import { ExampleException } from './example.exception';
+import * as Sentry from '@sentry/nestjs';
+
+@Catch(ExampleException)
+export class ExampleExceptionFilter extends BaseExceptionFilter {
+  catch(exception: unknown, host: ArgumentsHost) {
+    Sentry.captureException(exception);
+    return super.catch(new BadRequestException(exception.message), host)
+  }
+}
+```