feat(server): auth server (#2773)

apps/server/src/modules/storage/fs.ts

@@ -0,0 +1,23 @@
+import { createWriteStream } from 'node:fs';
+import { mkdir } from 'node:fs/promises';
+import { join } from 'node:path';
+import { pipeline } from 'node:stream/promises';
+
+import { Injectable } from '@nestjs/common';
+
+import { Config } from '../../config';
+import { FileUpload } from '../../types';
+
+@Injectable()
+export class FSService {
+  constructor(private readonly config: Config) {}
+
+  async writeFile(key: string, file: FileUpload) {
+    const dest = this.config.objectStorage.fs.path;
+    await mkdir(dest, { recursive: true });
+    const destFile = join(dest, key);
+    await pipeline(file.createReadStream(), createWriteStream(destFile));
+
+    return `/assets/${destFile}`;
+  }
+}