fix(repository): Move backend code into subdirectory

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

src/api/utils/note-header.interceptor.ts

@@ -1,37 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-import {
-  CallHandler,
-  ExecutionContext,
-  Injectable,
-  NestInterceptor,
-} from '@nestjs/common';
-import { Request } from 'express';
-import { Observable } from 'rxjs';
-
-import { Note } from '../../notes/note.entity';
-import { NotesService } from '../../notes/notes.service';
-
-/**
- * Saves the note identified by the `HedgeDoc-Note` header
- * under the `note` property of the request object.
- */
-@Injectable()
-export class NoteHeaderInterceptor implements NestInterceptor {
-  constructor(private noteService: NotesService) {}
-
-  async intercept<T>(
-    context: ExecutionContext,
-    next: CallHandler,
-  ): Promise<Observable<T>> {
-    const request: Request & {
-      note: Note;
-    } = context.switchToHttp().getRequest();
-    const noteId: string = request.headers['hedgedoc-note'] as string;
-    request.note = await this.noteService.getNoteByIdOrAlias(noteId);
-    return next.handle();
-  }
-}