There are two things to configure. First, the domain that you wish to update needs to be provided as a command line argument. This can be done by adding it to the end of your run command (example in the Makefile) or by adding it as a command to your compose file. Eg:
Your Cloudflare credentials can be passed in any way that [python-cloudflare](https://github.com/cloudflare/python-cloudflare) allows. Generally, either via envioronment variables: