redis migration

Signed-off-by: ale <ale@manalejandro.com>

CONTRIBUTING.md

@@ -48,7 +48,7 @@ Thank you for considering contributing to Hasher! This document provides guideli
 Before submitting a PR:
 1. Test the web interface thoroughly
 2. Test the bulk indexing script
-3. Verify Elasticsearch integration
+3. Verify Redis integration
 4. Check for TypeScript errors: `npm run build`
 5. Run linter: `npm run lint`