fix: correctly initialize exception mapping

The constructor of an exception filter must be given
an instance of HttpAdapterHost, otherwise it will crash at runtime.

This can be reproduced by GETing /.

Reference: https://docs.nestjs.com/exception-filters#inheritance
Signed-off-by: David Mehren <git@herrmehren.de>

src/errors/error-mapping.ts

@@ -6,6 +6,7 @@
 import {
   ArgumentsHost,
   BadRequestException,
+  Catch,
   ConflictException,
   InternalServerErrorException,
   NotFoundException,
@@ -67,6 +68,7 @@ const mapOfHedgeDocErrorsToHttpErrors: Map<string, HttpExceptionConstructor> =
     ],
   ]);
 
+@Catch()
 export class ErrorExceptionMapping extends BaseExceptionFilter<Error> {
   catch(error: Error, host: ArgumentsHost): void {
     super.catch(ErrorExceptionMapping.transformError(error), host);

src/main.ts

@@ -5,7 +5,7 @@
  */
 import { LogLevel } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
-import { NestFactory } from '@nestjs/core';
+import { HttpAdapterHost, NestFactory } from '@nestjs/core';
 import { NestExpressApplication } from '@nestjs/platform-express';
 
 import { AppModule } from './app.module';
@@ -79,7 +79,8 @@ async function bootstrap(): Promise<void> {
   app.useStaticAssets('public', {
     prefix: '/public/',
   });
-  app.useGlobalFilters(new ErrorExceptionMapping());
+  const { httpAdapter } = app.get(HttpAdapterHost);
+  app.useGlobalFilters(new ErrorExceptionMapping(httpAdapter));
   await app.listen(appConfig.port);
   logger.log(`Listening on port ${appConfig.port}`, 'AppBootstrap');
 }