The instructions within the [README [file]](https://github.com/IntelligenceX/SDK/tree/master/Python#docker--vs-code) return the `docker: open .env: no such file or directory` error. Line #4 of [devcontainer.json](https://github.com/IntelligenceX/SDK/blob/master/Python/.devcontainer/devcontainer.json#L4) refers to the `.env` file which may refer to [.env.sample file](https://github.com/IntelligenceX/SDK/blob/master/Python/.env.sample) [as an example]. Can this be clarified?