update license structures and setup file storage services

src/multer.config.ts

@@ -0,0 +1,27 @@
+import { BadRequestException } from '@nestjs/common'
+
+export const imageFileFilter = (
+  req: any,
+  file: Express.Multer.File,
+  callback: (error: Error | null, acceptFile: boolean) => void,
+) => {
+  if (!file.mimetype.startsWith('image/')) {
+    return callback(new BadRequestException('Only image files are allowed'), false)
+  }
+
+  const allowed = ['image/jpeg', 'image/png', 'image/webp']
+
+  if (!allowed.includes(file.mimetype)) {
+    return callback(
+      new BadRequestException('Only JPEG, PNG, WEBP images are allowed'),
+      false,
+    )
+  }
+
+  callback(null, true)
+}
+
+export const multerImageOptions = {
+  fileFilter: imageFileFilter,
+  limits: { fileSize: 5 * 1024 * 1024 }, // 5MB
+}