Configuration reference

Every configuration variable — server, database, storage, auth, mail, rate limits, and the hooks directory — is documented with its default in .env.example at the repository root. Common ones: DATABASE_URL (defaults to a local SQLite file; postgres://... switches backends with no code change), CRATEBASE_DATA_DIR, PORT, AUTH_SECRET, AUTH_RATE_LIMIT_ENABLED, and CB_HOOKS_DIR.