ERROR: Versionin"./docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose fileversion. Either specify a version of "2" (or "2.0") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to useversion 1. Formoreon the Compose fileformat versions, see https://docs.docker.com/compose/compose-file/