Usage: example [--config-file FILE_PATH] [--port PORT] [--log-level LOG_LEVEL] [--payment-public-key PUBLIC_KEY --payment-secret-key FILE_PATH [--payment-currency CURRENCY]] COMMAND example program description Available settings: Show this help text switch: -h|--help Output version information: 0.0.0 switch: --version Path to the configuration file option: --config-file FILE_PATH env: CONFIG_FILE FILE_PATH port to serve requests on option: --port PORT env: PORT PORT config: port: # or null  # 16 bit unsigned integer default: 8080 minimal severity of log messages option: --log-level LOG_LEVEL env: LOG_LEVEL LOG_LEVEL config: log-level: # or null  default: "DEBUG" Public key option: --payment-public-key PUBLIC_KEY env: PAYMENT_PUBLIC_KEY PUBLIC_KEY config: payment.public-key: # or null  Secret key option: --payment-secret-key FILE_PATH env: PAYMENT_SECRET_KEY FILE_PATH config: payment.secret-key: # or null  Currency option: --payment-currency CURRENCY env: PAYMENT_CURRENCY CURRENCY config: payment.currency: # or null  Available commands: read read command explanation create create command explanation sub command with subcommand