You cannot push your code to Cloud Platform by running acli push:code.

ide:~/project (master) $ acli push:code
Please use git to push code changes upstream.

To push your code, do one of the following depending on your workflow:

• If your workflow involves committing vendor dependencies, run git push.

• If your workflow does not involve committing vendor dependencies, run acli push:artifact.

For more information, see Acquia CLI commands.