secrets: (docker-compose.yml)

• https://docs.docker.com/compose/compose-file/#secrets
• https://github.com/compose-spec/compose-spec/blob/master/spec.md#secrets-top-level-element

docker-compose, docker-compose.yml: [services | volumes | networks | up | down | restart | logs | create | changelog | version | secrets | config | -v | -h | exec], docker-compose pull, Environment:, Docker-compose.yml examples, .env, release notes, expose: