FLASK_ENV=development SECRET_KEY=change-me DATABASE_URL=sqlite:///expense_monitor.db APP_HOST=0.0.0.0 APP_PORT=5000 MAX_CONTENT_LENGTH_MB=10 REGISTRATION_ENABLED=false MAIL_SERVER= MAIL_PORT=465 MAIL_USE_TLS=false MAIL_USE_SSL=true MAIL_USERNAME= MAIL_PASSWORD= MAIL_DEFAULT_SENDER=no-reply@example.com INSTANCE_PATH=/app/instance