Environment variables

Variable	Purpose
ADMIN_EMAIL / ADMIN_PASSWORD	credentials used by trek:admin:user
POSTMARK_API_TOKEN	Postmark email delivery (auto-injected into credentials by the installer)
DEEPL_AUTH_KEY	automatic locale translation in the scaffold generator
FEATURE_STORAGE	local (development) or s3 (production)
S3_BUCKET, S3_REGION, S3_ENDPOINT, S3_ACCESS_KEY_ID, S3_SECRET_ACCESS_KEY, S3_BASE_URL	S3 storage configuration for uploads