ERROR: Version in "./docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") 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 use version 1. For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/
查看当前docker-compose版本
[root@localhost]# docker-compose -v docker-compose version 1.23.2, build 1110ad01
解决：
docker-compose版本太低，升级docker-compose版本
升级方法
https://www.cnblogs.com/xiaoyou2018/p/12925220.html
