Docs: Add ApiProperty to all Dtos

This makes it possible for the autogenerated openapi file to contain all the dtos instead of nothing.

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/media/media-upload-url.dto.ts

@@ -5,8 +5,10 @@
  */
 
 import { IsString } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
 
 export class MediaUploadUrlDto {
   @IsString()
+  @ApiProperty()
   link: string;
 }