fix(repository): Move backend code into subdirectory

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

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

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { ApiProperty } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
+import { IsDate, IsOptional, IsString } from 'class-validator';
+
+import { BaseDto } from '../utils/base.dto.';
+
+export class MediaUploadDto extends BaseDto {
+  /**
+   * The link to the media file.
+   * @example "https://example.com/uploads/testfile123.jpg"
+   */
+  @IsString()
+  @ApiProperty()
+  url: string;
+
+  /**
+   * The publicId of the note to which the uploaded file is linked to.
+   * @example "noteId" TODO how looks a note id?
+   */
+  @IsString()
+  @IsOptional()
+  @ApiProperty()
+  notePublicId: string | null;
+
+  /**
+   * The date when the upload objects was created.
+   * @example "2020-12-01 12:23:34"
+   */
+  @IsDate()
+  @Type(() => Date)
+  @ApiProperty()
+  createdAt: Date;
+
+  /**
+   * The username of the user which uploaded the media file.
+   * @example "testuser5"
+   */
+  @IsString()
+  @ApiProperty()
+  username: string;
+}