Fixes #16 by replacing uses of the `apt_key:` module with `get_url:` to download apt keyrings into `/etc/apt/keyrings`, then used `signed-by=/etc/path/keyrings/<keyring>` in the appropriate sources.list file.
Fixes #16 by replacing uses of the `apt_key:` module with `get_url:` to download apt keyrings into `/etc/apt/keyrings`, then used `signed-by=/etc/path/keyrings/<keyring>` in the appropriate sources.list file.