chore: temporarily disable redis with mock client

no ports on deployed version detected on render

Changes in redis connection

fix: support REDIS_URL for robust render deployment

fix: pin node version to 20.x for render compatibility

fix: remove duplicate mongoose indexes

deployment issue

Fix Redis DB issue connection

chore: update website title to CodeBuddy

chore: add production URLs to allowed origins in backend

Fix: Update submissionApi to use relative /api path for correct cookie handling

Fix: Strip /api prefix in Vercel rewrites and Vite proxy

Fix: Set axios baseURL to /api and improve backend error handling

Optimize: Configure Vite proxy, Vercel rewrites, and cleanup backend

Remove logo image from README