https://github.com/OpenZeppelin/openzeppelin-relayer/blame/43b016c4e5faa5ee1fedcdadccf3bc768962178e/docker-compose.yaml#L132-L135
Getting this output when trying to run docker-compose up:
~/openzeppelin-relayer$ docker-compose up ERROR: The Compose file './docker-compose.yaml' is invalid because: secrets.api_key value 'environment' does not match any of the regexes: '^x-' secrets.webhook_signing_key value 'environment' does not match any of the regexes: '^x-'