Environment and Config

Key variables (see config/README.md and config/.env.example in the repo):

• PORT — Backend port (default 5001).
• MONGODB_URI_LOCAL / MONGODB_URI_PROD — MongoDB connection string.
• JWT_SECRET, JWT_EXPIRES_IN — JWT signing and expiry.
• COOKIE_NAME, COOKIE_DOMAIN — Session cookie.
• CORS_ORIGIN — Allowed frontend origin (exact match).
• VITE_API_BASE_URL — Baked into frontend build; must match backend API base.
• NODE_ENV — development or production.

Env files: config/.env.dev, config/.env.prod (gitignored), config/.env.ci (CI only).

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Related: Secrets and env, Backend overview