`variables` Map Key-value pairs that represent environment variables that will be passed to your service. Copilot will include a number of environment variables by default for you. variables.`from_cfn` String The name of a [CloudFormation stack export](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-stack-exports.html).

`env_file` String The path to a file from the root of your workspace containing the environment variables to pass to the main container. For more information about the environment variable file, see [Considerations for specifying environment variable files](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/taskdef-envfiles.html#taskdef-envfiles-considerations).