Fix VPS Session Logout Issue

My React front-end and Node.js back-end run perfectly on my local machine, yet once deployed to my VPS the user is thrown out the moment a login succeeds. No visible errors come back to the browser; the session simply vanishes. I need someone who can jump into the live VPS, trace why the session is not being maintained, and apply a clean, production-safe fix. Feel free to inspect the build process, environment variables, cookie or token settings, reverse-proxy rules—whatever you suspect is killing the session. Once the root cause is removed I expect a quick walkthrough so I can replicate the solution on staging or future servers. Deliverables: • Diagnose the exact reason the session ends immediately on the VPS • Patch the code, configuration, or server setup so sessions remain active under normal use • Demonstrate the fix live (or via short notes) so I can confirm stable logins across page refreshes and new tabs Familiarity with React, Express, cookies/JWTs, Nginx or similar proxies, and basic Linux server administration will help you move fast. Let me know how soon you can start and roughly how long you expect the repair to take.

ID Projek: 40339069