feat: remove appwrite and add nextjs backend

backend/src/file/dto/file.dto.ts

@@ -0,0 +1,22 @@
+import { Expose, plainToClass } from "class-transformer";
+import { ShareDTO } from "src/share/dto/share.dto";
+
+export class FileDTO {
+  @Expose()
+  id: string;
+
+  @Expose()
+  name: string;
+
+  @Expose()
+  size: string;
+
+  @Expose()
+  url: boolean;
+
+  share: ShareDTO;
+
+  constructor(partial: Partial<FileDTO>) {
+    return plainToClass(FileDTO, partial, { excludeExtraneousValues: true });
+  }
+}