Fix Turbopack NFT warning

- Remove import.meta.dirname from turbopack config (unnecessary filesystem op)
- Add /*turbopackIgnore: true*/ to 3 path.join calls in upload-import.ts
  that were missing the comment, causing Turbopack to trace the whole
  project unintentionally

next.config.ts

@@ -20,7 +20,7 @@ const securityHeaders = [
 ];
 
 const nextConfig: NextConfig = {
-	turbopack: { root: import.meta.dirname },
+	turbopack: {},
 	serverExternalPackages: [
 		"@prisma/adapter-mariadb",
 		"mariadb",