First of all I installed Debian 8, and now somehow I have buster now, and I don’t recall ever updating.
Finally, my actual issue is that when I try to add the Docker repo as per these instructions, I get these errors
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
What I could suggest is following these steps from the official Docker website on how to install Docker on Debian:
Hope that this helps!
Interact with the DigitalOcean API via the command line: