Promising script... Got this error though

[inglesuniversal]

Hello:

I got the following error after I enter the following command

$ docker-compose run php composer install

bitnami@ip-172-26-7-199:~/htdocs/omr$ docker-compose run php composer install
ERROR: Version in "./docker-compose.yml" is unsupported. You might be seeing this error bec
ause you're using the wrong Compose file version. Either specify a version of "2" (or "2.0"
) and place your service definitions under the services key, or omit the version key an
d 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-f
ile/

Any idea on how to solve this?