Don't follow these instructions for anything even half-serious, don't use it at work. The agent is downloaded from latest release from github. One day 1.30 is the latest, another day older patched version 1.15.1 is the latest, or maybe even 1.45.0-alpha is the latest. You don't control what version is being downloaded, so best of luck when it breaks and you didn't change anything. That docker volume should be mounded with ro flags too.