Core Config Files
`config/database.js` handles database connection.
`config/checkpoint.js` applies performance middleware and request-level optimizations.
`config/passport.js` wires local and social auth strategies.
Backend Documentation
Configuration
Runtime configuration for sessions, database, third-party APIs, and transport-layer behavior.
Environment Variables
MONGODB_URISESSION_SECRETFRONTEND_URLNODE_ENVPORTOPENAI_API_KEYPAYSTACK_SECRET_KEYMETA_APP_IDMETA_APP_SECRETMETA_APP_TOKENWHATSAPP_VERIFY_TOKENINSTAGRAM_VERIFY_TOKEN