fix: Store private files in the static directory by default (#8325)

packages/modules/providers/file-local/src/services/local-file.ts

@@ -12,8 +12,13 @@ export class LocalFileService extends AbstractFileProviderService {
   constructor(_, options: LocalFileServiceOptions) {
     super()
     this.uploadDir_ = options?.upload_dir || path.join(process.cwd(), "static")
+
+    // Since there is no way to serve private files through a static server, we simply place them in `static`.
+    // This means that the files will be available publicly if the filename is known. Since the local file provider
+    // is for development only, this shouldn't be an issue. If you really want to use it in production (and you shouldn't)
+    // You can change the private upload dir to `/private` but none of the functionalities where you use a presigned URL will work.
     this.privateUploadDir_ =
-      options?.private_upload_dir || path.join(process.cwd(), "private")
+      options?.private_upload_dir || path.join(process.cwd(), "static")
     this.backendUrl_ = options?.backend_url || "http://localhost:9000/static"
   }
 
@@ -73,7 +78,7 @@ export class LocalFileService extends AbstractFileProviderService {
   }
 
   // For private files, we simply return the file path, which can then be loaded manually by the backend.
-  // The local file provider doesn't support presigned URLs for private files.
+  // The local file provider doesn't support presigned URLs for private files (i.e files not placed in /static).
   async getPresignedDownloadUrl(
     file: FileTypes.ProviderGetFileDTO
   ): Promise<string> {