refactor: added credentials line to enableCors in app.ts

[Neon-20]

Adding credentials

• By setting credentials: true in the CORS configuration, we're telling the browser that the server is allowed to receive credentials in the request.
• This allows the browser to include credentials in the request, and the server can then authenticate the request accordingly.

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected)
• I have added a Docs issue here if this PR makes changes that would require a documentation change
• I have added or modified automated tests that prove my fix is effective or that my feature works (PRs might be rejected if logical changes are not properly tested)

[vercel]

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[graphite-app]

Graphite Automations

"Add community label" took an action on this PR • (06/25/24)

1 label was added to this PR based on Keith Williams's automation.

"Add consumer team as reviewer" took an action on this PR • (06/25/24)

1 reviewer was added to this PR based on Keith Williams's automation.